LH stimulates the

Correct Answer: D

Rationale: LH triggers corpus luteum formation in females.

Correct Answer: B

Rationale: The adrenal cortex (zonae) does not secrete epinephrine; that's from the medulla.

Correct Answer: A

Rationale: Insulin secretion depends on glucose entry into β cells via GLUT2, triggering Ca2+ influx (not efflux of K^+). Metformin enhances sensitivity, not secretion, and cAMP promotes it.

Correct Answer: C

Rationale: Assuming 'TSN' is a typo for TSH (thyroid-stimulating hormone), cold temperatures stimulate its release via TRH. Dopamine and somatostatin inhibit it, stress has variable effects, and glucocorticoids suppress it.

Correct Answer: D

Rationale: Fat stores vastly exceed carbohydrate (glycogen) stores, approximately 40:1 in a typical human, reflecting fat's higher energy density.