The following statements are made about the variety of thermoregulatory mechanisms in the body. A. Human voluntary activity is decreased in cold. B. There is a cutaneous vasodilation by heat. C. There is an increased secretion of epinephrine and nor-epinephrine in cold. D. There is a decreased heat production in cold. Choose the combination of all correct statements about thermoregulatory mechanisms:

Correct Answer: B

Rationale: A is true (cold reduces activity to conserve heat), B is true (heat causes cutaneous vasodilation to dissipate heat), C is true (cold increases epinephrine/norepinephrine for heat production), but D is false (heat production increases in cold). B (B and C) is the best fit for correct statements.

Correct Answer: A

Rationale: Persistent depression requires professional intervention (counseling and possibly antidepressants), as it’s a serious condition post-cardiac event. Herbal remedies (B) lack evidence here, C is adjunctive, and D may not address the root psychological issue.

Correct Answer: B

Rationale: Clarifying cardiac rehab timing shows understanding of recovery steps post-CABG. A (smoking), C (hot tubs risk infection), and D (driving too soon) indicate poor grasp of restrictions and rehab needs.

Correct Answer: A

Rationale: Atherosclerosis is the buildup of plaques (fatty deposits) in artery walls, leading to their hardening and narrowing (Choice A). Inflammation of the heart (Choice B) is myocarditis, weakening of blood vessels (Choice C) could describe aneurysms, and excessive clotting (Choice D) relates to thrombosis. Only 'hardening of the arteries' accurately defines atherosclerosis.