Question 1

Which structural layer of an artery is primarily responsible for regulating blood pressure through vasoconstriction and vasodilation?

Accepted Answer

Tunica media

Question 2

A patient presents with a blood pressure of 160/100 mmHg. Which of the following hormones would most likely be secreted to help lower blood pressure?

Accepted Answer

Atrial natriuretic peptide (ANP)

Question 3

Which of the following best describes the function of precapillary sphincters?

Accepted Answer

They control the entrance of blood into capillary beds, adjusting local tissue perfusion.

Question 4

Which of the following equations correctly represents the relationship between blood pressure, cardiac output, and peripheral resistance?

Accepted Answer

$$BP = CO 	imes PR$$

Question 5

A patient with polycythemia has an increased hematocrit. What effect does this have on blood viscosity and blood pressure?

Accepted Answer

Blood viscosity increases, leading to higher blood pressure.

Question 6

Which of the following mechanisms is NOT involved in maintaining venous blood flow against gravity?

Accepted Answer

High arterial pressure in veins

Question 7

A patient suffers a hemorrhage and loses 20% of their blood volume. Which short-term compensatory mechanism is most likely to occur?

Accepted Answer

Increased cardiac output and peripheral vasoconstriction

Question 8

Which of the following is a correct description of an arterial anastomosis?

Accepted Answer

A fusion of arteries before branching into arterioles, ensuring blood delivery to key organs

Question 9

Which of the following is a consequence of arteriosclerosis?

Accepted Answer

Thickening and hardening of arterial walls, reducing blood flow to tissues

Question 10

Which reflex is activated in response to a decrease in blood pH and an increase in plasma CO$$_2$$?

Accepted Answer

Chemoreceptor reflex

Question 11

Which of the following statements about veins is TRUE?

Accepted Answer

Veins have valves that prevent backflow and can act as blood reservoirs.

Question 12

A patient develops a deep vein thrombosis (DVT) in the leg. What is the most serious potential complication?

Accepted Answer

Pulmonary embolism

Question 13

Which of the following best explains why arteries are located deep beneath the skin in the neck and limbs?

Accepted Answer

To protect them from injury due to their high pressure

Question 14

Which vessel carries nutrient-rich blood from the digestive organs to the liver for processing before returning to the heart?

Accepted Answer

Hepatic portal vein

Question 15

Which of the following is the correct sequence of blood flow through the pulmonary circuit?

Accepted Answer

Right ventricle → pulmonary arteries → lungs → pulmonary veins → left atrium

Question 16

Which of the following is a direct effect of increased secretion of antidiuretic hormone (ADH)?

Accepted Answer

Peripheral vasoconstriction and increased blood pressure

Question 17

Which of the following is the primary function of capillaries?

Accepted Answer

Serve as exchange vessels for nutrients, gases, waste, and fluids

Question 18

A patient with chronic hypertension is at increased risk for which vascular complication due to weakened arterial walls?

Accepted Answer

Aneurysm

Question 19

Which of the following best describes the baroreceptor reflex response to increased blood pressure?

Accepted Answer

Decreased cardiac output and widespread vasodilation

Question 20

During vigorous exercise, which of the following changes occurs to maintain adequate blood pressure despite extensive vasodilation?

Accepted Answer

Increased cardiac output

Blood Vessels: Structure, Function, and Disorders (Anatomy & Physiology Study Notes)

Study Guide - Practice Questions