Blood Pressure Regulation and Afferent Arteriole Constriction Quiz
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Questions and Answers

Which substance is excreted by the kidneys in urine?

  • Toxins
  • Metabolic wastes
  • Excess ions
  • All of the above (correct)

What is the function of renin in the body?

  • Converting vitamin D to its active form
  • Regulating water volume in the body
  • Regulating red blood cell production
  • Regulating blood pressure (correct)

Where are the adrenal glands located in relation to the kidneys?

  • Inside each kidney
  • Below each kidney
  • In front of each kidney
  • On top of each kidney (correct)

Which layer of the kidney prevents infections in surrounding regions from spreading to the kidney?

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

Which region of the kidney collects urine and drains it into the renal pelvis?

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

What is the function of the smooth muscle in the walls of the calyces, pelvis, and ureter?

<p>To propel urine by peristalsis (B)</p> Signup and view all the answers

Which blood vessels supply the cortical tissue of the kidney?

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

Which hormone is released by the granular cells of the juxtaglomerular complex in response to low blood pressure?

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

Which segment of the renal tubule reabsorbs all of the glucose and amino acids in the filtrate?

<p>Proximal Convoluted Tubule (PCT) (A)</p> Signup and view all the answers

Which part of the nephron loop is permeable to water?

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

Which hormone inhibits diuresis, or urine output?

<p>Anti-Diuretic Hormone (ADH) (A)</p> Signup and view all the answers

Which part of the renal tubule is responsible for reabsorbing most of the water, salt, and other components from the filtrate?

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

What is the main function of the glomerulus?

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

Which type of nephron plays an important role in the kidneys' ability to produce concentrated urine?

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

Which process in urine formation involves selectively moving substances from the blood into the filtrate?

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

Which two types of controls serve different needs in the regulation of glomerular filtration?

<p>Intrinsic controls and extrinsic controls (C)</p> Signup and view all the answers

Which mechanism reflects the property of vascular smooth muscle that contracts when stretched and relaxes when not stretched?

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

Which cells in the juxtaglomerular complex respond to filtrate NaCl concentration and regulate the flow-dependent tubuloglomerular feedback mechanism?

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

What happens to the NFP and GFR when there is a drop in blood flow due to the flow-dependent tubuloglomerular feedback mechanism?

<p>NFP and GFR decrease (D)</p> Signup and view all the answers

Which hormone increases the permeability of the principal cells of the collecting ducts to water?

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

Which hormone decreases the secretion of ADH by the posterior pituitary?

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

Which hormone increases the reabsorption of calcium?

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

Which process moves selected substances from the peritubular capillaries through the tubule cells into the filtrate?

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

Which of the following is true about glomerular filtration in the kidneys?

<p>It is primarily regulated by the diameter of the afferent arteriole (D)</p> Signup and view all the answers

What is the main force that pushes water and solutes out of the blood and across the filtration membrane in glomerular filtration?

<p>Hydrostatic pressure in the glomerular capillaries (D)</p> Signup and view all the answers

What factors determine the glomerular filtration rate (GFR)?

<p>Net filtration pressure, total surface area available for filtration, and filtration membrane permeability (D)</p> Signup and view all the answers

Why is the glomerular filtration rate (GFR) tightly regulated?

<p>To regulate blood pressure (C)</p> Signup and view all the answers

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