Question

mary has been in an accident and is losing blood. what hormone will the hypothalamus signal the release of to conserve water?
o a. renin
b. angiotensin
o c aldosterone
d. antidiuretic hormone

Explanation:

To solve this, we analyze each option:

• Option a (Renin): An enzyme from the kidneys, not a hormone released by the hypothalamus for water conservation.
• Option b (Angiotensin): A peptide involved in blood pressure regulation, not directly for water conservation by hypothalamic signaling.
• Option c (Aldosterone): A hormone from the adrenal cortex, regulated by the renin - angiotensin system, not released by the hypothalamus.
• Option d (Antidiuretic hormone (ADH)): The hypothalamus signals its release (from the posterior pituitary) to increase water reabsorption in the kidneys, conserving water, especially in cases of blood loss (which can lead to dehydration).

Answer:

d. Antidiuretic hormone