Which of the following selections lists conditions that would lead to increased stroke volume?

Correct Answer: C

Rationale: Increased preload stretches the cardiac muscle more, decreased afterload reduces resistance to ejection, and increased contractility enhances force of contraction, all contributing to higher stroke volume.

Correct Answer: D

Rationale: The heart receives innervation from both sympathetic and parasympathetic systems, including the vagus nerve.

Correct Answer: A

Rationale: Blood passing through the tricuspid valve has just left the right atrium.

Correct Answer: A

Rationale: The temporal artery is located in front of the ear, where its pulse can be palpated.

Correct Answer: C

Rationale: Atrial systole pushes blood from the atria into the ventricles through the cuspid (atrioventricular) valves (tricuspid and mitral), not out of the heart or through semilunar valves.