Human Anatomy Urinary System Quiz
132 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which of the following structures is part of the male urethra?

  • renal vein
  • distal convoluted tubule
  • spongy urethra (correct)
  • transitional epithelium

Which structure is primarily responsible for transporting urine from the kidney to the bladder?

  • ureter (correct)
  • renal pyramid
  • urethra
  • afferent arteriole

What type of epithelium is typically found in the urinary bladder?

  • simple squamous
  • transitional (correct)
  • ciliated columnar
  • cuboidal

Which part of the urinary system is primarily involved in the formation of urine?

<p>kidney (C)</p> Signup and view all the answers

Which structure surrounds the glomerulus in the kidney?

<p>Bowman's capsule (A)</p> Signup and view all the answers

Identify the letter that indicates blood vessels that absorb solutes from the convoluted tubules.

<p>C (A)</p> Signup and view all the answers

Which structure houses receptors sensitive to antidiuretic hormone (ADH)?

<p>D (B)</p> Signup and view all the answers

Which structure is primarily responsible for controlling the flow of urine from the bladder?

<p>detrusor (D)</p> Signup and view all the answers

What is the name of the knot of capillaries that directs blood into the efferent arteriole?

<p>glomerulus (C)</p> Signup and view all the answers

What type of blood vessels create a ladderlike structure within the renal medulla?

<p>vasa recta (B)</p> Signup and view all the answers

Identify the letter that indicates the parietal layer of the glomerular capsule.

<p>B (E)</p> Signup and view all the answers

What structure delivers urine to a minor calyx?

<p>papillary duct (B)</p> Signup and view all the answers

What is the term used to describe the location of the kidneys relative to the abdominal cavity?

<p>retroperitoneal (B)</p> Signup and view all the answers

What do the openings seen at the tip of a renal papilla represent?

<p>openings of papillary ducts (C)</p> Signup and view all the answers

Which of the following components of the nephron is primarily located in the renal medulla?

<p>collecting ducts (C)</p> Signup and view all the answers

In what order do the following blood vessels carry blood to the kidney: renal artery, interlobar artery, arcuate artery, cortical radiate artery?

<p>4, 3, 2, 6 (A)</p> Signup and view all the answers

Where do blood vessels and nerves enter the kidney?

<p>medial hilum (C)</p> Signup and view all the answers

What structure contains cup-shaped tubes that enclose the papillae of the pyramids?

<p>major calyx (A)</p> Signup and view all the answers

What percentage of the fluid filtered by the kidney ultimately becomes urine?

<p>1% (D)</p> Signup and view all the answers

Which region of the distal tubule is responsible for monitoring the concentration of the filtrate?

<p>macula densa (A)</p> Signup and view all the answers

Which statement about the kidneys is correct?

<p>Both parts of the statement are true. (B)</p> Signup and view all the answers

What occurs in the renal pelvis prior to urine entering the ureter?

<p>urine is collected (D)</p> Signup and view all the answers

Identify the layer of the glomerular capsule covered by podocytes.

<p>E (C)</p> Signup and view all the answers

What physiological process occurs at the structure labeled '1' in the nephron?

<p>filtration (C)</p> Signup and view all the answers

Identify the structure labeled '8'.

<p>major calyx (A)</p> Signup and view all the answers

Which of the following does not contribute to urine production in the kidneys?

<p>evaporation (D)</p> Signup and view all the answers

Where does countercurrent multiplication occur within the nephron?

<p>structure labeled '6' (C)</p> Signup and view all the answers

Which structure is not part of the renal corpuscle?

<p>nephron loop (C)</p> Signup and view all the answers

Which structure is responsible for nutrient reabsorption?

<p>proximal convoluted tubule (B)</p> Signup and view all the answers

Which hormone primarily controls the reabsorption of water in the kidney?

<p>antidiuretic hormone (vasopressin) (D)</p> Signup and view all the answers

Which structure is responsible for the reabsorption of water and solutes from the filtrate?

<p>collecting duct (A)</p> Signup and view all the answers

Which blood vessels directly supply blood to the nephrons?

<p>afferent arterioles (C)</p> Signup and view all the answers

Which structure in the kidney is primarily involved in filtration?

<p>glomerulus (A)</p> Signup and view all the answers

In which region of the kidney is the renal pyramid situated?

<p>medulla (C)</p> Signup and view all the answers

Which structure is primarily responsible for the secretion of substances into the urine?

<p>distal convoluted tubule (B)</p> Signup and view all the answers

Which structure is primarily involved in the production of urine?

<p>juxtamedullary nephron (A)</p> Signup and view all the answers

Which structure is responsible for draining urine from the kidney to the bladder?

<p>ureter (D)</p> Signup and view all the answers

Which region of the nephron is primarily located in the renal medulla?

<p>collecting duct (B)</p> Signup and view all the answers

What is the correct path for urine flow from the kidneys?

<p>renal pelvis to the ureter to the bladder to the urethra (C)</p> Signup and view all the answers

What factor increases the permeability of collecting tubule cells to water?

<p>an increase in the production of ADH (D)</p> Signup and view all the answers

What type of epithelium lines the urinary bladder to allow distension?

<p>transitional (C)</p> Signup and view all the answers

Which gland is located atop each kidney?

<p>adrenal (D)</p> Signup and view all the answers

How does an increase in ADH affect urine concentration?

<p>It concentrates urine by promoting water reabsorption. (D)</p> Signup and view all the answers

Which structure collects urine from the nephron before it enters the renal pelvis?

<p>collecting duct (D)</p> Signup and view all the answers

Which structure does NOT play a direct role in urine transport?

<p>glomerulus (C)</p> Signup and view all the answers

Which area is NOT sensitive to the hormone ADH?

<p>1 (B)</p> Signup and view all the answers

Where does the filtration of plasma primarily occur?

<p>renal corpuscle (B)</p> Signup and view all the answers

What is the primary function of aldosterone in the kidneys?

<p>Increase sodium uptake (A)</p> Signup and view all the answers

At which point in the renal corpuscle is filtration not allowed for larger substances?

<p>Filtration membrane (C)</p> Signup and view all the answers

Which measurement accurately describes the approximate daily volume of glomerular filtrate produced?

<p>180 liters (C)</p> Signup and view all the answers

Which structure is most affected when ADH levels decrease?

<p>Collecting duct (D)</p> Signup and view all the answers

What size of substances is typically restricted from passing through the filtration membrane?

<p>Albumin (C)</p> Signup and view all the answers

Which mechanism is NOT used by the kidney to help regulate systemic blood pressure?

<p>Decrease aldosterone secretion (B)</p> Signup and view all the answers

What are the components that make up the renal corpuscle?

<p>Glomerular (Bowman's) capsule and the glomerulus (B)</p> Signup and view all the answers

Which structure contains the macula densa?

<p>Distal convoluted tubule (A)</p> Signup and view all the answers

What is the primary role of the juxtaglomerular complex?

<p>Regulation of blood pressure (C)</p> Signup and view all the answers

Where does urine first pass after leaving the glomerular capsule?

<p>Proximal convoluted tubule (D)</p> Signup and view all the answers

What is the structure known as the renal papilla?

<p>Tip of the medullary pyramid (D)</p> Signup and view all the answers

Which capillaries are formed by the division of efferent arterioles?

<p>Vasa recta (D)</p> Signup and view all the answers

What is the primary function of the glomerulus in the renal corpuscle?

<p>Filtration of blood (C)</p> Signup and view all the answers

Which nephron segment is characterized by its U-shaped structure?

<p>Nephron loop (loop of Henle) (B)</p> Signup and view all the answers

What is the result of excessive secretion of antidiuretic hormone (ADH)?

<p>Concentration of urine increases (D)</p> Signup and view all the answers

What type of epithelium is found lining the ureters and urinary bladder?

<p>Transitional epithelium (C)</p> Signup and view all the answers

If blood flow to the kidneys is significantly reduced during heavy exercise, what could be a potential consequence?

<p>Decreased urine output (A), Irreversible kidney damage (B)</p> Signup and view all the answers

Which statement accurately describes the role of antidiuretic hormone (ADH)?

<p>It makes the collecting ducts more permeable to water. (B)</p> Signup and view all the answers

In which order does urine travel through the structures after formation?

<p>Collecting duct, ureter, bladder, urethra (A)</p> Signup and view all the answers

What might occur if there is a lack of antidiuretic hormone (ADH) secretion?

<p>Increased water excretion (D)</p> Signup and view all the answers

What role does aldosterone play in the kidney's function?

<p>Promotes sodium reabsorption (B)</p> Signup and view all the answers

Which structure is primarily associated with urine storage before being excreted from the body?

<p>Urinary Bladder (B)</p> Signup and view all the answers

Which component of the urinary system is primarily responsible for the transport of urine from the kidneys to the bladder?

<p>Ureter (D)</p> Signup and view all the answers

Which structure is involved in the filtration process in the kidney?

<p>Afferent arteriole (C)</p> Signup and view all the answers

Which of the following is part of the lower urinary tract?

<p>Bladder (B)</p> Signup and view all the answers

Which structure is highlighted when indicating the passage where urine exits the body?

<p>Urethra (B)</p> Signup and view all the answers

Which hormone controls reabsorption of water in the highlighted structure?

<p>antidiuretic hormone (vasopressin) (B)</p> Signup and view all the answers

Which blood vessels are highlighted?

<p>cortical radiate vessels (B)</p> Signup and view all the answers

Which structure is primarily involved in the active transport of solutes?

<p>distal convoluted tubule (D)</p> Signup and view all the answers

Which structure is highlighted?

<p>collecting duct (B)</p> Signup and view all the answers

Which part of the nephron is primarily responsible for reabsorption?

<p>proximal convoluted tubule (B)</p> Signup and view all the answers

In which region of the kidney is the renal column located?

<p>cortex (B)</p> Signup and view all the answers

Which structure is primarily responsible for filtering blood?

<p>glomerulus (B)</p> Signup and view all the answers

What distinguishes the vasa recta from the peritubular capillaries in the kidney?

<p>The vasa recta are located in the medulla, while the peritubular capillaries are in the cortex. (B)</p> Signup and view all the answers

Which renal vein is generally longer?

<p>The left renal vein is longer than the right renal vein. (D)</p> Signup and view all the answers

Which of the following statements about the urinary bladder is false?

<p>When empty, the bladder lies superior to the abdominal cavity. (D)</p> Signup and view all the answers

At which vertebral level is the hilum of the kidney located?

<p>L1 or L2 (C)</p> Signup and view all the answers

What type of arteries branch to form the afferent arterioles to the glomeruli?

<p>Cortical radiate arteries. (B)</p> Signup and view all the answers

Which structure is most numerous within a kidney?

<p>Renal corpuscles. (C)</p> Signup and view all the answers

In the juxtaglomerular apparatus, the macula densa is part of which structure?

<p>Terminal nephron loop. (B)</p> Signup and view all the answers

Which part of the male urethra is the longest?

<p>Spongy urethra. (B)</p> Signup and view all the answers

Which structure is known for its role in transporting urine away from the bladder?

<p>Ureter (D)</p> Signup and view all the answers

What is the primary area where the filtration of plasma occurs?

<p>renal corpuscle (A)</p> Signup and view all the answers

Which of the following structures is primarily considered part of the urinary system for urine storage?

<p>Urinary bladder (C)</p> Signup and view all the answers

Which structure specifically performs the function of filtering blood in the kidney?

<p>Bowman's capsule (A)</p> Signup and view all the answers

Which substances are normally prevented from passing through the filtration membrane?

<p>albumin (D)</p> Signup and view all the answers

What mechanism helps the kidneys raise systemic blood pressure?

<p>increase secretion of renin (D)</p> Signup and view all the answers

Which part of the urethra is considered part of the male reproductive system?

<p>Prostatic urethra (D)</p> Signup and view all the answers

What type of epithelium is typically found lining the urethra?

<p>Stratified squamous (B)</p> Signup and view all the answers

Approximately how many liters of glomerular filtrate are produced each day?

<p>180 liters (A)</p> Signup and view all the answers

Which structure contains the filtration barrier in the renal corpuscle?

<p>all of the above (D)</p> Signup and view all the answers

What happens to urine production when levels of ADH decrease?

<p>more urine is produced (B)</p> Signup and view all the answers

Which condition is described by the secretion of large volumes of dilute urine?

<p>decreased ADH levels (D)</p> Signup and view all the answers

In the presence of increased aldosterone levels, urine concentration of which ion is likely to be higher?

<p>sodium ions (D)</p> Signup and view all the answers

What is the term used to describe the cup-shaped tubes that enclose the papillae of the pyramids?

<p>minor calyx (C), major calyx (D)</p> Signup and view all the answers

Which region of the nephron is primarily responsible for monitoring the concentration of the filtrate?

<p>macula densa (B)</p> Signup and view all the answers

What is a significant anatomical difference between the vasa recta and the peritubular capillaries in the kidney?

<p>Vasa recta are found in the medulla while peritubular capillaries are in the cortex. (A)</p> Signup and view all the answers

What structure is identified by the term 'hilum' in the kidney?

<p>concave surface for vessel entry (C)</p> Signup and view all the answers

What percentage of nephrons are described as 'cortical' due to their position in the kidney?

<p>85% (A)</p> Signup and view all the answers

Compared to the left renal vein, how does the right renal vein differ?

<p>It is shorter than the left renal vein. (D)</p> Signup and view all the answers

Which muscle contractions are responsible for forcing urine from the bladder?

<p>detrusor muscle (B)</p> Signup and view all the answers

Which statement is incorrect regarding the anatomy of the urinary bladder?

<p>The bladder is typically located above the abdominal cavity when empty. (A)</p> Signup and view all the answers

The hilum of the kidney is situated at which vertebral level?

<p>At the level of L1 or L2. (B)</p> Signup and view all the answers

Which structure represents the area where the kidneys are located in relation to the abdominal cavity?

<p>retroperitoneal (A)</p> Signup and view all the answers

Which arteries give rise to the afferent arterioles that lead to the glomeruli?

<p>cortical radiate arteries. (A)</p> Signup and view all the answers

Which blood vessel is responsible for supplying blood directly to the nephron?

<p>afferent arteriole (B)</p> Signup and view all the answers

Which structure primarily collects the filtrate that has been formed by the nephron before it enters the renal pelvis?

<p>collecting ducts (B)</p> Signup and view all the answers

Among the following structures, which is the most abundant within a kidney?

<p>Renal corpuscles. (B)</p> Signup and view all the answers

In the juxtaglomerular apparatus, the macula densa is associated with which structure?

<p>Distal convoluted tubule. (D)</p> Signup and view all the answers

Which segment of the male urethra is the longest?

<p>Spongy urethra. (A)</p> Signup and view all the answers

Which hormone is responsible for increasing water reabsorption in the kidney's collecting ducts?

<p>antidiuretic hormone (vasopressin) (D)</p> Signup and view all the answers

Which blood vessels are responsible for delivering blood to the glomeruli?

<p>affferent arterioles (D)</p> Signup and view all the answers

Which structure is primarily involved in urine transport from the kidney?

<p>ureter (A)</p> Signup and view all the answers

Which structure is responsible for filtering blood in the nephron?

<p>renal corpuscle (D)</p> Signup and view all the answers

Which structure is responsible for urine formation within the kidney?

<p>nephron (A)</p> Signup and view all the answers

Which part of the nephron is involved in the secretion of potassium and hydrogen ions?

<p>distal convoluted tubule (B)</p> Signup and view all the answers

Which structure connects to the minor calyx in the kidney?

<p>major calyx (D)</p> Signup and view all the answers

What is formed by the glomerular (Bowman's) capsule and the glomerulus?

<p>renal corpuscle (C)</p> Signup and view all the answers

Which part of the nephron contains the macula densa?

<p>distal convoluted tubule (D)</p> Signup and view all the answers

What is the juxtaglomerular complex primarily composed of?

<p>juxtaglomerular cells and macula densa (B)</p> Signup and view all the answers

What does a glomerulus consist of?

<p>a knot of capillaries (D)</p> Signup and view all the answers

Which nephron structure directly follows the glomerular capsule in urine formation?

<p>proximal convoluted tubule (C)</p> Signup and view all the answers

The U-shaped segment of the nephron is known as what?

<p>nephron loop (loop of Henle) (A)</p> Signup and view all the answers

What best describes a renal papilla?

<p>tip of the renal pyramid (A)</p> Signup and view all the answers

Which capillaries are formed from the efferent arteriole of a nephron?

<p>peritubular capillaries (B)</p> Signup and view all the answers

Flashcards

Kidney Structure: Medulla

Inner region of the kidney containing collecting ducts and loops of Henle, critical for concentrating urine.

Urine Pathway to Minor Calyx

Papillary ducts deliver urine to a minor calyx, a funnel-like structure in the kidney.

Kidney Blood Vessel Order

Blood flows from the renal artery to interlobar, arcuate, cortical radiate arteries, then afferent arterioles, glomerulus, efferent arterioles, and peritubular capillaries.

Nephron Medullary Location

Collecting ducts are primarily located in the renal medulla, aiding in urine concentration.

Signup and view all the flashcards

Kidney Location: Retroperitoneal

Kidneys sit behind the abdominal lining, not within the peritoneal cavity.

Signup and view all the flashcards

Kidney Structure: Renal Pyramid

Cone-shaped structures within the kidney, containing parts of nephrons and collecting ducts.

Signup and view all the flashcards

Nephron Filtration Site

Filtration occurs at the glomerulus within the renal corpuscle, where blood pressure forces water and solutes into Bowman's capsule.

Signup and view all the flashcards

Countercurrent Multiplication Location

Countercurrent multiplication happens in the nephron loop (loop of Henle), crucial for the kidney's ability to concentrate urine.

Signup and view all the flashcards

Glomerulus location

A knot of capillaries in the nephron, directing blood into the efferent arteriole.

Signup and view all the flashcards

Renal corpuscle part

The part of the nephron containing the glomerulus and Bowman's capsule.

Signup and view all the flashcards

Nephron location(85%)

Cortical nephrons, located mostly in the cortex of the kidney.

Signup and view all the flashcards

Filtrate monitoring area

The macula densa in the distal tubule, monitors filtrate concentration.

Signup and view all the flashcards

Kidney's abdominal position

Retroperitoneal; positioned behind the abdominal peritoneum.

Signup and view all the flashcards

Urine expulsion muscle

The bladder's muscles contract to expel urine.

Signup and view all the flashcards

Collecting Duct Enclosing Structure

Minor calyx encloses the papillae of the kidney pyramids.

Signup and view all the flashcards

Kidney entry/exit point

Hilum is the medial concave cleft where vessels, ureters, and nerves enter/leave the kidney.

Signup and view all the flashcards

Ureter

A tube that carries urine from the kidney to the urinary bladder.

Signup and view all the flashcards

Membranous Urethra

The short, middle portion of the male urethra that passes through the urogenital diaphragm.

Signup and view all the flashcards

Prostatic Urethra

The portion of the male urethra that passes through the prostate gland.

Signup and view all the flashcards

Spongy Urethra

The longest part of the male urethra that passes through the penis.

Signup and view all the flashcards

Urinary Bladder

A hollow, muscular organ that stores urine before it is eliminated from the body.

Signup and view all the flashcards

Where does the nephron loop reside?

The nephron loop, also known as the loop of Henle, is primarily located in the renal medulla, the inner region of the kidney.

Signup and view all the flashcards

Collecting Duct Location

The collecting duct runs through both the renal cortex and medulla, but its main part is found in the medulla, where it plays a major role in urine concentration.

Signup and view all the flashcards

What controls water permeability?

An increase in ADH (antidiuretic hormone) leads to increased permeability of the collecting duct cells to water, resulting in more water reabsorption and concentrated urine.

Signup and view all the flashcards

Bladder Epithelial Type

The urinary bladder is lined by transitional epithelium, a unique type that allows it to stretch and accommodate changes in volume.

Signup and view all the flashcards

Kidney's Adrenal Neighbor

The adrenal glands, important for hormone production, sit atop each kidney, like a cap.

Signup and view all the flashcards

Kidney Filtrate Pathway

Urine travels from the renal pelvis, a kidney chamber, to the ureter, a tube connecting the kidney to the bladder.

Signup and view all the flashcards

Where does filtration occur?

Filtration, the first step in urine formation, takes place in the glomerulus, a network of capillaries within the renal corpuscle.

Signup and view all the flashcards

Urine Concentration: Countercurrent Multiplication

The countercurrent mechanism in the nephron loop (loop of Henle) helps the kidney create a concentration gradient, concentrating urine by reabsorbing water.

Signup and view all the flashcards

Afferent Arteriole

A blood vessel that carries blood to the glomerulus for filtration in the kidney. It is typically wider than the efferent arteriole.

Signup and view all the flashcards

Efferent Arteriole

A blood vessel that carries blood away from the glomerulus after filtration in the kidney. It is typically narrower than the afferent arteriole.

Signup and view all the flashcards

What is reabsorbed in the collecting duct?

Water reabsorption is regulated by the hormone antidiuretic hormone (ADH), also known as vasopressin. ADH controls how much water the collecting duct reabsorbs into the bloodstream, influencing urine concentration.

Signup and view all the flashcards

Descending Loop of Henle

The portion of the nephron loop that is permeable to water but not to solutes, allowing water reabsorption into the hypertonic medullary interstitium.

Signup and view all the flashcards

Ascending Loop of Henle

The portion of the nephron loop that is permeable to solutes but not to water, allowing reabsorption of sodium and other ions into the interstitium.

Signup and view all the flashcards

Cortical Radiate Arteries

Small arteries that branch from arcuate arteries and supply blood to the renal cortex, specifically to the nephrons.

Signup and view all the flashcards

Glomerular Capsule

Also known as Bowman's capsule, surrounds the glomerulus and is where filtration of blood occurs in the kidney.

Signup and view all the flashcards

Renal Papilla

The apex of a renal pyramid, the tip that projects into a minor calyx and releases urine into the collecting system.

Signup and view all the flashcards

What muscle contracts to empty the bladder?

The detrusor muscle, a smooth muscle found in the walls of the bladder, contracts to expel urine from the bladder.

Signup and view all the flashcards

Where do blood vessels pass through the kidney?

Blood vessels, nerves, and the ureter enter and exit the kidney through the hilum, a medial concave cleft on the kidney's inner surface.

Signup and view all the flashcards

Function of the vasa recta in the kidney?

The vasa recta are loop-shaped blood vessels found within the medulla of the kidney, playing a crucial role in concentrating urine by maintaining the osmotic gradient.

Signup and view all the flashcards

Why are UTIs more common in females?

Females are more susceptible to UTIs because their urethra is shorter than males, making it easier for bacteria to travel from the anus to the bladder.

Signup and view all the flashcards

Which layer of the kidney is most superficial?

The renal cortex, the outermost layer of the kidney, contains glomeruli, proximal and distal tubules of nephrons, and cortical collecting ducts.

Signup and view all the flashcards

What is the function of the renal papilla?

The renal papilla is the tip of a renal pyramid projecting into a minor calyx, where urine is collected and passed into the renal pelvis.

Signup and view all the flashcards

What is the function of the renal pelvis?

The renal pelvis is a funnel-shaped structure within the kidney that collects urine from the calyces and channels it into the ureter.

Signup and view all the flashcards

What happens in the kidney's nephron loop?

The nephron loop, also known as the loop of Henle, is responsible for concentrating urine by establishing an osmotic gradient within the medulla.

Signup and view all the flashcards

Renal Corpuscle

The functional unit of the kidney where filtration occurs, consisting of a glomerulus and Bowman's capsule.

Signup and view all the flashcards

Macula Densa

A specialized group of cells in the distal convoluted tubule that monitors filtrate concentration and helps regulate filtration rate.

Signup and view all the flashcards

Juxtaglomerular Complex

A specialized structure at the junction of the afferent arteriole and the distal convoluted tubule, involved in regulating blood pressure and blood volume.

Signup and view all the flashcards

Glomerulus

A network of capillaries located within the Bowman's capsule, where blood filtration occurs.

Signup and view all the flashcards

Proximal Convoluted Tubule

The first segment of the nephron after Bowman's capsule, responsible for reabsorbing most of the filtered water and solutes.

Signup and view all the flashcards

Distal Convoluted Tubule

The last segment of the nephron before the collecting duct, involved in fine-tuning the composition of urine and regulating blood pressure.

Signup and view all the flashcards

Nephron Loop (Loop of Henle)

A U-shaped segment of the nephron that descends into the renal medulla and then ascends back to the cortex, playing a crucial role in concentrating urine.

Signup and view all the flashcards

Collecting Duct

A long, straight tube that collects urine from multiple nephrons and transports it to the renal pelvis.

Signup and view all the flashcards

What is the membranous urethra?

The short, middle portion of the male urethra that passes through the urogenital diaphragm, a muscular structure.

Signup and view all the flashcards

What is the spongy urethra?

The longest part of the male urethra that passes through the penis, also known as the penile urethra.

Signup and view all the flashcards

What is the prostatic urethra?

The part of the male urethra that passes through the prostate gland, a walnut-shaped gland below the bladder.

Signup and view all the flashcards

What is the role of the urinary bladder?

A hollow, muscular organ that stores urine before it is eliminated from the body.

Signup and view all the flashcards

What is the role of the ureter?

A tube that carries urine from the kidney to the urinary bladder.

Signup and view all the flashcards

ADH's Impact on Urine

Antidiuretic hormone (ADH) increases the collecting duct's permeability to water, leading to more water reabsorption and a concentrated urine output.

Signup and view all the flashcards

What Happens When ADH is Absent?

Without ADH, the collecting ducts become less permeable to water, resulting in a larger volume of dilute urine.

Signup and view all the flashcards

Kidney's Response to Exercise

Heavy exercise can reduce blood flow to the kidneys, potentially leading to kidney injury, protein in the urine (proteinuria), and blood in the urine (hematuria).

Signup and view all the flashcards

Where is Transitional Epithelium Found?

Transitional epithelium, which can stretch and change shape, lines the ureters and urinary bladder.

Signup and view all the flashcards

Urine Flow Pathway

Urine passes through the collecting duct, renal pelvis, ureter, bladder, and then the urethra.

Signup and view all the flashcards

Identify the Major Calyx

The major calyx is a large funnel-shaped structure in the kidney that collects urine from several minor calyces.

Signup and view all the flashcards

Oxygenated Blood to Kidney

The renal artery carries oxygenated blood to the kidney.

Signup and view all the flashcards

Boundary Between Cortex and Medulla

The arcuate arteries and veins define the border between the renal cortex (outer layer) and the renal medulla (inner layer) of the kidney.

Signup and view all the flashcards

Peritubular Capillaries

A network of tiny blood vessels that surround the renal tubules in the kidney cortex, playing a key role in reabsorption of water and solutes.

Signup and view all the flashcards

Vasa Recta

Long, straight blood vessels in the renal medulla, running alongside the loops of Henle. They participate in maintaining the concentration gradient needed for urine concentration.

Signup and view all the flashcards

Left Renal Vein vs Right

The left renal vein is longer than the right renal vein because it has to pass over the aorta to reach the inferior vena cava.

Signup and view all the flashcards

Urinary Bladder Location (Females)

The bladder sits behind the uterus but in front of the rectum in females.

Signup and view all the flashcards

Kidney Location (Vertebra)

Based on its position, the hilum of the kidney, where vessels enter and exit, is located at the level of the L1 or L2 vertebra.

Signup and view all the flashcards

Afferent Arteriole Origin

Afferent arterioles, which carry blood to the glomerulus for filtration, are formed from branches of the cortical radiate arteries.

Signup and view all the flashcards

Bowman's Capsule

Surrounds the glomerulus and collects the filtered fluid, also known as filtrate.

Signup and view all the flashcards

Most Numerous Kidney Structure

Renal corpuscles, the units within the nephron that contain the glomerulus and Bowman's capsule, are the most numerous structures in the kidney.

Signup and view all the flashcards

Macula Densa Location

The macula densa, a specialized group of cells in the distal tubule, is part of the juxtaglomerular apparatus, which helps regulate blood pressure and filtration rate.

Signup and view all the flashcards

Where is ADH sensitive?

The collecting ducts of the nephron are sensitive to ADH, which regulates water reabsorption and influences urine concentration.

Signup and view all the flashcards

Penicillin secretion location

Penicillin is secreted into the proximal convoluted tubule (PCT) and, to a lesser extent, the distal convoluted tubule (DCT) of the nephron.

Signup and view all the flashcards

Filtration site in the kidney

Filtration, the first step in urine formation, occurs in the glomerulus, a network of capillaries within the renal corpuscle.

Signup and view all the flashcards

Filtration barrier components

The filtration barrier in the renal corpuscle consists of three layers: endothelium of glomerulus, dense layer (basement membrane) of glomerulus, and podocyte filtration slits.

Signup and view all the flashcards

Glomeruli structure

Glomeruli are tufts of capillaries, specialized for filtering blood in the kidney.

Signup and view all the flashcards

What doesn't pass the filtration membrane?

Substances larger than albumin, a large protein, are normally blocked from passing through the filtration membrane.

Signup and view all the flashcards

Where does plasma filtration occur?

Filtration of plasma takes place in the renal corpuscle, which includes the glomerulus and Bowman's capsule.

Signup and view all the flashcards

How kidneys raise blood pressure

One mechanism the kidneys use to raise blood pressure is by increasing the secretion of renin by the juxtaglomerular complex.

Signup and view all the flashcards

What makes up the renal corpuscle?

The renal corpuscle is composed of the glomerulus and Bowman's capsule.

Signup and view all the flashcards

What forms the juxtaglomerular complex?

The juxtaglomerular complex is formed by the macula densa and the juxtaglomerular cells.

Signup and view all the flashcards

What is a glomerulus?

A glomerulus is a network of capillaries located within the renal corpuscle.

Signup and view all the flashcards

Where does the filtrate go after Bowman's capsule?

From Bowman's capsule, the filtrate travels to the proximal convoluted tubule.

Signup and view all the flashcards

What part of the nephron empties into the collecting duct?

The distal convoluted tubule empties into the collecting duct.

Signup and view all the flashcards

What is the nephron loop?

The nephron loop, also known as the loop of Henle, is a U-shaped segment of the nephron.

Signup and view all the flashcards

What describes a renal papilla?

A renal papilla is the tip of the medullary pyramid, where urine is released.

Signup and view all the flashcards

ADH's Role in Urine

Antidiuretic hormone (ADH) increases water reabsorption in the collecting duct, making urine more concentrated.

Signup and view all the flashcards

Where Does ADH Act?

The collecting ducts of the nephron are sensitive to ADH, which controls their water permeability.

Signup and view all the flashcards

Penicillin's Path

Penicillin is secreted into the proximal and distal convoluted tubules of the nephron.

Signup and view all the flashcards

Kidney's Filtration Site

Filtration, the first step in urine formation, takes place within the glomerulus, a network of capillaries in the renal corpuscle.

Signup and view all the flashcards

Filtration Barrier - Layers

The filtration barrier in the renal corpuscle has three layers: glomerular endothelium, basement membrane, and podocyte filtration slits.

Signup and view all the flashcards

What Can't Pass the Filter?

Substances larger than albumin, a protein, are usually blocked from passing through the filtration membrane.

Signup and view all the flashcards

Glomerulus Function

A knot of capillaries within the nephron where blood is filtered into Bowman's capsule.

Signup and view all the flashcards

Proximal Convoluted Tubule (PCT)

The first segment of the nephron after Bowman's capsule, responsible for reabsorbing most of the filtered water and solutes.

Signup and view all the flashcards

Distal Convoluted Tubule (DCT)

The last segment of the nephron before the collecting duct, involved in fine-tuning the composition of urine and regulating blood pressure.

Signup and view all the flashcards

What blood vessels are highlighted?

The highlighted structures are the arcuate vessels. These arteries and veins mark the boundary between the renal cortex and medulla, playing a crucial role in blood flow to the kidney. They branch from the interlobar arteries and feed into the cortical radiate arteries.

Signup and view all the flashcards

Afferent arterioles: Function?

Afferent arterioles carry blood to the glomerulus. These vessels are critical for the filtration process in the kidney, supplying the glomerulus with blood to be filtered.

Signup and view all the flashcards

Glomerulus: Filtration Site

The glomerulus is a network of capillaries within the renal corpuscle. It's here that blood pressure forces water and solutes out of the blood, forming filtrate.

Signup and view all the flashcards

What is the purpose of the cortical radiate arteries and veins?

These vessels supply blood to the cortex of the kidney. They are responsible for delivering blood to the nephrons for essential functions like filtration, reabsorption, and secretion.

Signup and view all the flashcards

Collecting Duct: Where is it found?

The collecting duct is found in both the renal cortex and medulla. However, its main part is located in the medulla, where it plays a crucial role in concentrating urine by reabsorbing water.

Signup and view all the flashcards

Efferent Arterioles: What do they do?

Efferent arterioles carry blood away from the glomerulus after filtration. They are responsible for draining filtered blood and helping to regulate blood pressure.

Signup and view all the flashcards

Renal Papilla: Function

The renal papilla is the tip of a renal pyramid projecting into a minor calyx. It's where urine is released from the pyramid into the collecting system.

Signup and view all the flashcards

What is the role of the minor calyx?

The minor calyx is a funnel-shaped structure that collects urine from the papillary ducts of the renal pyramids. It acts as a collector, channeling urine towards the major calyces.

Signup and view all the flashcards

Peritubular Capillaries vs. Vasa Recta

Peritubular capillaries surround the renal tubules in the cortex, involved in reabsorption. Vasa recta are in the medulla near the loop of Henle, helping maintain the concentration gradient for urine concentration.

Signup and view all the flashcards

Kidney Hilum Location

The hilum of the kidney, where vessels and ureters enter and exit, is at the level of the L1 or L2 vertebra.

Signup and view all the flashcards

Study Notes

Multiple Choice Questions

  • Urine is eliminated through the urethra.
  • Urine is carried to the urinary bladder by the ureters.
  • The urinary system does not include the rectum.
  • The urinary system excretes wastes.
  • Kidneys are important for blood pressure, volume, and pH regulation.
  • Kidneys are retroperitoneal, covered by a fibrous capsule, and held in place by the renal fascia. They are not located within the pelvic cavity.
  • The hilum is the prominent indentation on the medial surface of the kidney.
  • The outermost layer of the kidney is the fibrous capsule.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

Related Documents

Urinary System Pretest PDF

Description

Test your knowledge of the urinary system with this quiz. Questions cover urine elimination, kidney functions, and the anatomy of the urinary tract. Assess your understanding of the vital role the urinary system plays in waste excretion and regulation.

More Like This

Use Quizgecko on...
Browser
Browser