During a Marathon Which of the Following Hormones is Least

Question

During a marathon which of the following hormones is least likely to be released by the runner?
A) atrial natriuretic peptide (ANP)
B) epinephrine
C) antidiuretic hormone (ADH)
D) angiotensin II

Accepted Answer

Atrial natriuretic peptide (ANP) is least likely to be released during a marathon because it is primarily involved in reducing blood volume and pressure by causing vasodilation and increasing the excretion of sodium and water by the kidneys. During a marathon, the body's focus is on maintaining blood pressure and volume to ensure adequate circulation and hydration, which involves the release of hormones like epinephrine, ADH, and angiotensin II that work to conserve or increase blood volume and pressure, not decrease it.