The correct order of the layers of the heart from deep to superficial are:

Correct Answer: D

Rationale: The layers of the heart from deep to superficial are endocardium, myocardium, and epicardium.

Correct Answer: D

Rationale: Vasomotor control, regulated by the autonomic nervous system, primarily affects the diameter of arterioles, altering peripheral resistance and blood flow.

Correct Answer: C

Rationale: Indications for a heart transplant include end-stage heart failure (stage D), but other factors such as coping skills, family support, and patient motivation to follow the rigorous posttransplant regimen are also considered. Patients with diabetes who have well-controlled blood glucose levels may be candidates for heart transplant. Although heart transplants can be associated with many complications, there are no data to suggest that the patient could not manage the care.

Correct Answer: D

Rationale: Cardiovascular drift involves physiological changes maintaining cardiac output during prolonged exercise.

Correct Answer: A

Rationale: The umbilical vein carries oxygenated blood from the placenta to the fetus, draining into the sinus venosus.