Question 1

Which of the following best describes the primary function of the cardiovascular system?

Accepted Answer

To transport nutrients, gases (O$$_2/CO$_2$$), hormones, and waste throughout the body

Question 2

A patient is experiencing vasodilation. Which of the following physiological changes is most likely to occur?

Accepted Answer

Decrease in blood pressure due to widened vessels

Question 3

Which chamber of the heart pumps oxygenated blood into the aorta for systemic circulation?

Accepted Answer

Left ventricle

Question 4

Which of the following equations correctly relates blood flow, pressure, and resistance?

Accepted Answer

$$Flow = \dfrac{Pressure}{Resistance}$$

Question 5

A patient with anemia has a reduced ability to transport oxygen. Which blood component is most likely deficient?

Accepted Answer

Red blood cells (RBCs)

Question 6

Which of the following is TRUE regarding the structure and function of alveoli in the respiratory system?

Accepted Answer

Alveoli have a large surface area and extremely thin respiratory membrane to facilitate gas exchange

Question 7

During cardiac muscle contraction, which ion is primarily responsible for triggering contraction?

Accepted Answer

Calcium (Ca$$^{2+})$$

Question 8

Which of the following best explains why capillaries are the primary site of exchange in the circulatory system?

Accepted Answer

They have thin walls and a large surface area, allowing efficient diffusion of gases and nutrients

Question 9

A patient is diagnosed with pneumonia, resulting in fluid-filled alveoli. What is the most direct consequence of this condition?

Accepted Answer

Decreased gas exchange due to impaired diffusion

Question 10

Which hormone is produced by the anterior pituitary and stimulates growth in children and muscle/bone maintenance in adults?

Accepted Answer

GH (Growth Hormone)

Question 11

Which of the following is a correct sequence for blood flow through the heart and major vessels?

Accepted Answer

Right atrium → Right ventricle → Pulmonary arteries → Left atrium → Left ventricle → Aorta

Question 12

Which of the following best describes the effect of increased membrane thickness on gas diffusion in the lungs?

Accepted Answer

Decreases the rate of gas diffusion

Question 13

A patient at high altitude experiences increased erythropoietin (EPO) production. What is the physiological reason for this response?

Accepted Answer

To increase red blood cell production and improve oxygen transport

Question 14

Which of the following statements about plasma is correct?

Accepted Answer

Plasma makes up about 55% of blood and is mostly water

Question 15

Which heart valve prevents backflow of blood from the left ventricle into the left atrium during ventricular contraction?

Accepted Answer

Mitral (bicuspid) valve

Question 16

Which of the following is a function of white blood cells (leukocytes)?

Accepted Answer

Initiate immune defense against pathogens

Question 17

Which hormone is produced by the adrenal cortex and helps regulate metabolism and stress responses?

Accepted Answer

Cortisol

Question 18

Which of the following best explains the role of surfactant in the lungs?

Accepted Answer

Reduces surface tension, preventing alveolar collapse

Question 19

A patient has a blockage in the pulmonary arteries. Which of the following is the most immediate consequence?

Accepted Answer

Reduced oxygenation of blood returning to the left atrium

Question 20

Which of the following best describes the effect of hyperventilation on blood pH?

Accepted Answer

Increases blood pH (alkalosis)

Comprehensive Study Notes: Cardiovascular, Blood, Respiratory, Heart, and Endocrine Systems

Study Guide - Practice Questions