Growth hormone

Correct Answer: B

Rationale: GH promotes cell growth (hypertrophy, hyperplasia); low glucose stimulates it.

Correct Answer: D

Rationale: A high protein diet increases Ca2+ absorption by enhancing intestinal acidity and amino acid-mediated uptake. Oxalates and phosphates bind Ca2+, reducing absorption; alkalis and high Ca2+ intake have less direct effect.

Correct Answer: A

Rationale: Thyroxine-binding globulin (TBG) has the highest affinity for T_4, binding most of it in plasma.

Correct Answer: C

Rationale: Lysine is an essential amino acid that must be obtained from the diet, unlike glycine, serine, glutamine, and tyrosine, which can be synthesized.

Correct Answer: C

Rationale: MMC occurs during fasting to clear the gut, distinct from BER; secretions decrease, and Phase I is quiescent, not contractile.