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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?

About 5 fmol/mL Signup and view all the answers

Under what condition is ANP secretion increased?

ECF volume increased by infusion of isotonic saline Signup and view all the answers

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

Atrial natriuretic peptide (ANP) Signup and view all the answers

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

Sodium loss and volume loss Signup and view all the answers

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

Stretching of the ventricles Signup and view all the answers

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

Two forms smaller than circulating ANP Signup and view all the answers

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

Decreases renin and aldosterone secretion Signup and view all the answers

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

Inhibiting Na+ and water reabsorption Signup and view all the answers

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

Stretching of the ventricles Signup and view all the answers

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

Decreases secretion of renin and aldosterone 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?

5 fmol/mL Signup and view all the answers

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