Which of the following describes a function of a hormone produced in zone of the adrenal gland labeled B?

Correct Answer: A

Rationale: Cortisol from zone 'B' (fasciculata) resists stress and raises glucose via gluconeogenesis, not sympathetic (medulla) or glycogenolysis (glucagon/epinephrine). This distinguishes cortisol's chronic stress function, vital for energy, contrasting with acute responses.

Correct Answer: A

Rationale: Adipose tissue produces leptin for appetite control, not insulin (pancreas) or others (mislisted organs). 'E' fits intent. This distinguishes leptin's metabolic role, vital for energy balance, contrasting with pancreatic or gonadal hormones.

Correct Answer: C

Rationale: Chromaffin cells in the adrenal medulla secrete epinephrine, not cortical zones (glomerulosa: aldosterone, fasciculata: cortisol, reticularis: androgens). This distinguishes catecholamine production, key to acute stress, contrasting with steroid zones.

Correct Answer: C

Rationale: Endocrine signaling uses blood vessels to transport hormones (e.g., cortisol) to targets, enabling systemic effects. Neurons signal electrically/chemically, not via blood transport distinct system. Ducts are exocrine (e.g., sweat glands), not endocrine. Membranes facilitate receptor binding, not transport. Blood vessels' role distinguishes endocrine reach, critical for widespread regulation, unlike neural, exocrine, or cellular mechanisms.

Correct Answer: B

Rationale: Negative feedback controls most endocrine secretions (e.g., high cortisol suppresses ACTH), maintaining homeostasis excess inhibits production. Positive feedback (e.g., oxytocin in labor) is rare, amplifying. Neural feedback is specific (e.g., medulla), not broad. Hormonal is a type, not the system. Negative feedback distinguishes endocrine stability, key to regulation, unlike amplifying or partial mechanisms.