Anatomy 2 Test #3

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Questions and Answers

What is the primary function of the conducting zone?

  • Air passage to the respiratory zone
  • Gas exchange
  • Production of surfactant
  • Humidifying and transporting air (correct)

Which of the following is considered part of the conducting zone of the respiratory system?

  • Alveoli
  • Pulmonary capillaries
  • Respiratory bronchioles
  • Trachea (correct)

What does high lung compliance indicate?

  • The lungs expand easily with minimal effort (correct)
  • The lungs are stiff and resist expansion
  • There is increased resistance in the airways
  • The thoracic cage is rigid

Which structure is part of the respiratory zone?

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

What is the primary difference between the conducting zone and the respiratory zone?

<p>Gas exchange occurs in the respiratory zone, not the conducting zone (B)</p> Signup and view all the answers

Where does gas exchange occur in the respiratory system?

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

How does parasympathetic input affect the respiratory system?

<p>Reduces respiratory rate (D)</p> Signup and view all the answers

What distinguishes the lower respiratory tract from the upper respiratory tract?

<p>Structures below the larynx (D)</p> Signup and view all the answers

Which muscle group is primarily involved in forced expiration?

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

Which of the following describes hyperventilation?

<p>Breathing rate or depth exceeds body demand (A)</p> Signup and view all the answers

Which structure warms, cleanses, and humidifies air?

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

What is the effect of sympathetic input on the bronchioles?

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

Which respiratory structure has C-shaped cartilages?

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

Which lung volume is always present in the lungs?

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

What is the role of mucin in the respiratory mucosa?

<p>Traps dust, dirt, and microbes (C)</p> Signup and view all the answers

Which structure separates the thoracic cavity into left and right pleural cavities?

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

What is the functional unit of the lungs for gas exchange?

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

What controls the basic rhythm of breathing?

<p>Dorsal respiratory group (DRG) (A)</p> Signup and view all the answers

How many lobes does the left lung have?

<p>Two (@)</p> Signup and view all the answers

What is the function of the lung hilum?

<p>To serve as the entry and exit point for pulmonary vessels, bronchi, and nerves (B)</p> Signup and view all the answers

Which reflex reduces overinflation of the lungs?

<p>Hering-Breuer reflex (A)</p> Signup and view all the answers

What allows bronchioles to constrict or dilate?

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

Which of the following gasses has the highest solubility in blood?

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

Which condition decreases lung compliance?

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

Which respiratory center smooths the transition between inspiration and expiration?

<p>Pons respiratory center (A)</p> Signup and view all the answers

Which respiratory volume measures the air inspired or expired in a normal breath?

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

Where are central chemoreceptors located?

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

How does the majority of carbon dioxide travel in the blood?

<p>As bicarbonate dissolved in plasma (B)</p> Signup and view all the answers

What could happen to kidney function if blood pressure falls below 80 mmHg?

<p>Cessation of waste elimination (A)</p> Signup and view all the answers

Which muscle controls voluntary release of urine?

<p>External urethral sphincter (D)</p> Signup and view all the answers

Which hormone stimulates red blood cell production in response to low blood oxygen levels?

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

What is the detrusor muscle responsible for?

<p>Contracting to expel urine from the bladder (C)</p> Signup and view all the answers

What happens during tubular secretion?

<p>Solutes are moved from the blood into the tubular fluid (A)</p> Signup and view all the answers

What part of the urinary system transports urine from the kidneys to the bladder?

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

What is the function of the trigone in the urinary bladder?

<p>Direct urine toward the urethra (A)</p> Signup and view all the answers

Which of the following is a key function of the urinary system?

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

What is the role of the ureters?

<p>Transport urine from the kidneys to the bladder (D)</p> Signup and view all the answers

What prevents large proteins from being filtered by the glomerulus?

Signup and view all the answers

What is the typical pH range of urine?

<p>4.5–8.0 (A)</p> Signup and view all the answers

What is the primary function of the kidneys?

<p>Filter blood and remove waste products (D)</p> Signup and view all the answers

What does hypertonic urine indicate?

<p>Concentrated urine due to water reabsorption (A)</p> Signup and view all the answers

What is the functional unit of the kidney?

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

What is the result of aldosterone secretion?

<p>Increased sodium and water reabsorption (C)</p> Signup and view all the answers

What is tubular reabsorption?

<p>Movement of substances from tubular fluid back into the blood (A)</p> Signup and view all the answers

What is the ascending limb of the nephron loop impermeable to?

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

Which substances are considered "freely filtered" during glomerular filtration?

<p>Small substances like water, glucose, amino acids, and ions (A)</p> Signup and view all the answers

What is the effect of antidiuretic hormone (ADH) on the nephron?

<p>Increases water reabsorption (B)</p> Signup and view all the answers

What is the primary role of the countercurrent multiplier in the nephron loop?

<p>Establish a concentration gradient in the medulla (D)</p> Signup and view all the answers

Which process occurs in the glomerulus?

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

What happens to urine concentration during dehydration?

<p>Urine becomes more concentrated due to increased ADH secretion (D)</p> Signup and view all the answers

What part of the nephron is responsible for filtration?

<p>Nephron loop (D), Glomerulus (A)</p> Signup and view all the answers

Which hormone is inhibited by atrial natriuretic peptide (ANP)?

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

Which hormone increases sodium reabsorption in the nephron?

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

What activates the micturition reflex?

<p>Stretch receptors in the bladder wall (B)</p> Signup and view all the answers

What percentage of water is typically reabsorbed by the kidneys?

<p>65% (A)</p> Signup and view all the answers

What structure collects urine directly from the renal pyramids?

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

What is the descending limb of the nephron loop permeable to?

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

What is the primary difference between cortical and juxtamedullary nephrons?

<p>Cortical nephrons have shorter loops that remain in the cortex, while juxtamedullary nephrons have longer loops extending into the medulla (C)</p> Signup and view all the answers

What is the outermost layer surrounding the kidneys?

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

Which of the following is a primary nitrogenous waste found in urine?

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

Which artery supplies blood to the kidneys?

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

What triggers the release of renin by the granular cells of the juxtaglomerular apparatus?

<p>Low blood pressure or low sodium levels (B)</p> Signup and view all the answers

What happens to substances categorized as "limited filtration"?

<p>They are usually blocked but may pass in small amounts due to size or charge (A)</p> Signup and view all the answers

Which segment of the nephron is primarily affected by ADH?

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

What is metabolism?

<p>chemical process within a living organism to maintain life (A)</p> Signup and view all the answers

What is catabolism?

<p>breakdown of complex molecules to simpler ones ; destructive metabolism (release energy) (C)</p> Signup and view all the answers

What is anabolism?

<p>synthesis of complex molecules from simpler ones; constructive metabolism (requires energy) (C)</p> Signup and view all the answers

What are monosaccharides?

<p>single glucose molecule (A), Glucose, fructose, galactose (D)</p> Signup and view all the answers

What are disaccharides?

<p>two glucose molecules (C), sucrose, lactose, maltose (@)</p> Signup and view all the answers

What are polysaccharides?

<p>multi glucose molecules (A), starches and fibers (@)</p> Signup and view all the answers

What are triglycerides?

<p>saturated, unsaturated, and polyunsaturated fats (A), composed of glycerol and fatty acids (C)</p> Signup and view all the answers

What are sterols (cholesterol)

<p>required component for plasma membrane, precursor hormone for steroid hormones, bile salts, and Vit. D (@)</p> Signup and view all the answers

What are phospholipids?

<p>make up cell membranes lipid bilayer (hydrophobic heads and hydrophilic tails) (@)</p> Signup and view all the answers

What are eicosanoids?

<p>signaling molecules (prostaglandins, leukotrienes, thromboxane) (D)</p> Signup and view all the answers

What are saturated fatty acids?

<p>Solid at room temps (Animal fats, coconut oil, and palm oil) (A)</p> Signup and view all the answers

What are unsaturated fatty acids?

<p>liquid at room temp - 2 or more double bonds - soybean, corn, safflower (B)</p> Signup and view all the answers

What are polyunsaturated fatty acids?

<p>liquid at room temp - 2 or more double bonds - soybean, corn, safflower (B)</p> Signup and view all the answers

What is a complete protein?

<p>Contain all essential amino acids (A), generally all animal proteins (B)</p> Signup and view all the answers

What is a incomplete protein?

<p>generally plant proteins (B), do not contain all essential amino acids (C)</p> Signup and view all the answers

What are vitamins? (Select all that apply)

<p>Organic molecules required for normal metabolism (A), Don't provide energy (calories) but play important roles in many metabolic processes (B)</p> Signup and view all the answers

What are water-soluble vitamins?

<p>Dissolve in water (A), B-complex (except B12) vitamins and vitamins C (C)</p> Signup and view all the answers

What is vitamin C required for?

<p>Synthesis of collagen (A)</p> Signup and view all the answers

What are fat-soluble vitamins?

<p>Vitamins A,D,E,K (C), dissolve in fats` (D)</p> Signup and view all the answers

What is the function of vitamin A?

<p>pre-cursor for formation of the visual pigment retinal (A)</p> Signup and view all the answers

What is the function of Vit E?

<p>help stabilized prevent damage to cell membranes (C)</p> Signup and view all the answers

What is the function of vit k?

<p>required for synthesis of specific blood clotting proteins (C)</p> Signup and view all the answers

What is the function of vit k?

<p>incr. Calcium absorption from GI tract (D)</p> Signup and view all the answers

What is the absorptive state?

<p>time spent eating , digesting , &amp; absorbing nutrients - last 4 hours after a meal (A), Conc. of glucose, triglycerides , and amino acids increased as they're absorbed from intestines (B)</p> Signup and view all the answers

What hormone is released in the absorptive state?

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

What is post-absorptive state?

<p>time between meals - body relying on stores of nutrients (C), Body working to maintain homeostatic levels of nutrient (D)</p> Signup and view all the answers

Where does glycolysis occur?

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

Where does the intermediate stage occur?

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

Where does the citric acid cycle occur?

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

Where does the electron transport system occur?

<p>membrane of mitochondria (A)</p> Signup and view all the answers

How much ATP is created in Glycolysis?

<p>2 (A)</p> Signup and view all the answers

How much ATP is produced in the intermediate stage?

<p>none (D)</p> Signup and view all the answers

How much ATP is produced in the citric acid cycle?

<p>2 (A)</p> Signup and view all the answers

How much ATP is produced in the electron transport system?

<p>26-28 (C)</p> Signup and view all the answers

How much ATP is produced in cellular respiration?

<p>30-32 (A)</p> Signup and view all the answers

When is lactic acid produced in glycolysis?

<p>During the conversion of pyruvate to lactate if insufficient O2 is available (A)</p> Signup and view all the answers

what are not functions of the respiratory system?

<p>Blood pressure/volume regulation (@), Hormone production (@)</p> Signup and view all the answers

Which are not a part of the respiratory zone?

<p>bronchus (D), bronchiole (@), pharynx (@)</p> Signup and view all the answers

What is the pleural membrane?

<p>A protective membrane surrounding the lungs (B)</p> Signup and view all the answers

What is the visceral pleura?

<p>The inner layer of the pleura that adheres directly to the lungs (C)</p> Signup and view all the answers

What is the parietal pleura?

<p>The outer layer of the pleura that covers the lungs (A)</p> Signup and view all the answers

What is the pleural cavity?

<p>The space between the pleural layers containing serous fluid (B)</p> Signup and view all the answers

What is the role of surfactant in the alveoli?

<p>To decrease surface tension (B)</p> Signup and view all the answers

What muscles are used for quiet breathing?

<p>diaphragm (C), external intercostal (B)</p> Signup and view all the answers

What muscles are involved in forced inspiration?

<p>serratus posterior (A), erector spine muscles (D), sternocleidomastoid (@)</p> Signup and view all the answers

When is intrapulmonary pressure equal to atmospheric pressure?

<p>at the end of inspiration (A), at the end of expiration (B)</p> Signup and view all the answers

When is intrapulmonary pressure less than atmospheric pressure?

<p>As air flows in during inspiration (D)</p> Signup and view all the answers

When is intrapulmonary pressure greater than atmospheric pressure?

<p>as air flows out during expiration (C)</p> Signup and view all the answers

Which respiratory volume measures the amount of air that can be inspired forcefully after the inspiration of tidal volume ?

<p>Inspiratory reserve volume (B)</p> Signup and view all the answers

Which respiratory volume measures the amount of air that can be expired forcefully after the inspiration of tidal volume ?

<p>Expiratory reserve volume (C)</p> Signup and view all the answers

What is the entrance point of an organ where tubes and vessels enter called?

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

what is the correct flow of urine?

<p>Renal pyramid, minor calyx, major calyx, renal pelvis, ureter</p> Signup and view all the answers

What are the 2 major structures of the nephron?

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

What is the glomerulus?

<p>tangle of capillary loops where blood enters Via an afferent arteriole and exits via an efferent arteriole (A)</p> Signup and view all the answers

What does the Renal corpuscle contain?

<p>Glomerulus and glomerular capsule</p> Signup and view all the answers

What does the renal tubule contain in proper order?

<p>Proximal convoluted tube, nephron loop, distal convoluted tube</p> Signup and view all the answers

What is the glomerular capsule?

<p>Surrounds the glomerulus &amp; receives the filtrate from the capillaries, which is the modified to form urine (B)</p> Signup and view all the answers

What is the renal tubule?

<p>consists of the PCT, nephron loop, and DCT (B)</p> Signup and view all the answers

What is the proximal convoluted tube?

<p>Originates from glomular capsule (A), contains lots of Microvilli (absorption)contains lots of Microvilli (absorption) (B)</p> Signup and view all the answers

What is the nephron loop (loop of Henle)

<p>contains 2 limbs (ascending &amp; descending) (C), each limb contains thick and thin segments (D)</p> Signup and view all the answers

What is the Distal convoluted tube?

<p>ends at collecting tubule and doesn't contain as many Microvilli (@), Begins after ascending loop (@)</p> Signup and view all the answers

What does atrial natriuretic peptide do? (select all the apply)

<p>secreted when BP is too high (B), inhibit reabsorption of sodium in PCT and collecting tubules (C), secreted when there is too much sodium and not enough potassium (@)</p> Signup and view all the answers

How can glomerular filtration rate be influenced? (Select all that apply)

<p>Change in luminal diameter of afferent arteriole (A), intrinsic and extrinsic controls (C), myogenic responses (@)</p> Signup and view all the answers

What happens to the afferent arteriole when there is a decrease in BP?

<p>Widens to allow more blood into glomerulus (B)</p> Signup and view all the answers

What happens to the afferent arteriole when there is an increase in BP?

<p>narrowed arteriole allows less blood into glomerulus (B)</p> Signup and view all the answers

What could happen to kidney function if blood pressure goes above 180 mmHg?

<p>urine formation increasing (B), increase in glomerular BP and Glomerular filtration rate (C)</p> Signup and view all the answers

What happens when blood is too acidic?

<p>bicarbonate is reabsorbed into blood (A), Hydrogen is excreted by type A intercalated cells (B)</p> Signup and view all the answers

What happens when blood is too basic?

<p>secrete bicarbonate by type B intercalated cells (B), reabsorb hydrogen (D)</p> Signup and view all the answers

What elements are not filtered?

<p>formed elemets (A), large proteins (B)</p> Signup and view all the answers

what elements have limited filtration?

<p>proteins of intermediate size due to size or negative charges (A)</p> Signup and view all the answers

What is the ascending limb of the nephron loop permeable to?

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

What is the descending limb of the nephron loop impermeable to?

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

Flashcards

Capital of France (example flashcard)

Paris

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