Atrial Natriuretic Peptide (ANP) Quiz

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Questions and Answers

What is the principal effect of Atrial natriuretic peptide (ANP) on the glomerulus?

  • Inhibition of Na+ and water reabsorption (correct)
  • Increase in renin and aldosterone secretion
  • Antagonism of Ang-II's and ADH's actions
  • Stimulation of Na+ and water reabsorption

What triggers the secretion of ANP?

  • Increased blood volume or pressure (correct)
  • Increased renin and aldosterone secretion
  • Decreased blood volume or pressure
  • Decreased renin and aldosterone secretion

How does ANP affect urine production?

  • Decreases GFR and Na + filtration
  • Causes ↑ GFR and ↑ Na + filtration with no compensatory Na + reabsorption in distal nephron (correct)
  • Promotes ADH secretion
  • Inhibits GFR and Na + filtration with compensatory Na + reabsorption in distal nephron

What is the concentration of ANP in plasma in normal humans ingesting moderate amounts of NaCl?

<p>About 5 fmol/mL (C)</p> Signup and view all the answers

Under what condition is ANP secretion increased?

<p>ECF volume increased by infusion of isotonic saline (C)</p> Signup and view all the answers

Which hormone is produced in the heart and secreted when blood volume or pressure is elevated?

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

What is the net effect of Atrial natriuretic peptide (ANP) on sodium and volume?

<p>Sodium loss and volume loss (A)</p> Signup and view all the answers

What triggers the secretion of B-type natriuretic peptide (BNP)?

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

In which form does Atrial natriuretic peptide (ANP) exist in the brain?

<p>Two forms smaller than circulating ANP (D)</p> Signup and view all the answers

What effect does immersion in water up to the neck have on the secretion of renin and aldosterone?

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

What is the primary effect of Atrial natriuretic peptide (ANP) on sodium and water excretion?

<p>Inhibiting Na+ and water reabsorption (D)</p> Signup and view all the answers

What triggers the secretion of Brain-type natriuretic peptide (BNP)?

<p>Stretching of the ventricles (C)</p> Signup and view all the answers

How does immersion in water up to the neck affect the secretion of renin and aldosterone?

<p>Decreases secretion of renin and aldosterone (C)</p> Signup and view all the answers

What is the concentration of Atrial natriuretic peptide (ANP) in plasma in normal humans ingesting moderate amounts of NaCl?

<p>5 fmol/mL (C)</p> Signup and view all the answers

Which hormone antagonizes Angiotensin II's actions and stimulates natriuresis through direct effects on the glomerulus?

<p>Atrial natriuretic peptide (ANP) (A)</p> Signup and view all the answers

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