Endocrine disorders resulting in too little hormone activity may stem from all of the following except

Correct Answer: C

Rationale: Reduced plasma protein binding increases free hormone levels, not decreases activity.

Correct Answer: D

Rationale: LH triggers corpus luteum formation in females.

Correct Answer: C

Rationale: GH reduces glucose uptake by muscle, sparing it for other tissues.

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.