[Campbell Biology P.1045] Atrial natriuretic peptide ANP plays an important role in regulatin... | Practice Question

Atrial natriuretic peptide ANP plays an important role in regulating blood volume and pressure. Which of the following statements accurately describes a function of ANP?

  • A: ANP increases renin release from the JGA.
  • B: ANP stimulates aldosterone release from the adrenal glands.
  • C: ANP inhibits NaCl reabsorption by the collecting ducts.
  • D: ANP increases blood volume and pressure.

Explanation

Atrial natriuretic peptide ANP is released by the heart atria in response to increased blood volume and pressure. Its main function is to oppose the effects of the RAAS. Specifically, ANP inhibits the release of renin from the JGA, inhibits NaCl reabsorption by the collecting ducts, and reduces aldosterone release from the adrenal glands. These actions collectively lead to a decrease in blood volume and pressure.