Answer: Aldosterone.
- A Cortisol
- B Aldosterone
- C Adrenaline
- D Insulin
Correct answer: B. Aldosterone
Explanation: Aldosterone, a mineralocorticoid of the adrenal cortex, promotes Na<sup>+</sup> reabsorption and K<sup>+</sup> excretion in the kidney.
The hypothalamus releases hormones that direct the pituitary, which releases its own trophic hormone to a target gland; that gland's hormone output then feeds back (dashed lines) to suppress both the pituitary and hypothalamus once levels are sufficient - a self-correcting loop running the entire endocrine system.
Concept context
The endocrine glands, hormone classification and mechanism of action, and negative feedback regulation.