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</p> Signup and view all the answers

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

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

    Which blood vessels supply the cortical tissue of the kidney?

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

    Which part of the nephron loop is permeable to water?

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

    Which hormone inhibits diuresis, or urine output?

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

    What is the main function of the glomerulus?

    <p>Filtration</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</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</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</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</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</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</p> Signup and view all the answers

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

    <p>ADH</p> Signup and view all the answers

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

    <p>ANP</p> Signup and view all the answers

    Which hormone increases the reabsorption of calcium?

    <p>PTH</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</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</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</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</p> Signup and view all the answers

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

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

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