A measure of the arterial blood pressure over time is the

Correct Answer: A

Rationale: Mean arterial pressure (MAP, A) averages arterial BP over time (MAP = diastolic + 1/3 pulse pressure). Stroke volume (B) is volume, resistance (C) is a factor, and pulse pressure (D) is systolic-diastolic.

Correct Answer: C

Rationale: The hepatic portal vein (C) carries nutrient-rich, oxygen-poor blood from the GI tract to the liver. Hepatic artery (B) supplies oxygen, aorta (A) is systemic, renal (D) is kidneys.

Correct Answer: B

Rationale: The diaphragm is supplied by phrenic arteries (B) from the aorta. Coronary (A) supplies the heart, renal (C) the kidneys, and vasa vasorum (D) vessel walls.

Correct Answer: B

Rationale: Arteries (B) have thick, elastic walls to handle high pressure (~100 mmHg). Veins are thin-walled with low pressure (A, D incorrect), and C contradicts arterial structure.

Correct Answer: B

Rationale: Chronic demand (e.g., hypertension) causes myocardial hypertrophy (B), increasing cell size. Hyperplasia (A) is rare in adult heart, C and D are pathological.