Q: Which of the following equations correctly represents cardiac output ($$CO$$)?

$$CO = Stroke\ Volume \times Heart\ Rate$$

Question 1

Which of the following best describes the main function of erythrocytes in the human body?

Accepted Answer

To transport oxygen from the lungs to tissues and carbon dioxide from tissues to the lungs

Question 2

A patient presents with fatigue, pallor, and a blood smear showing microcytic, hypochromic red blood cells. Which type of anemia is most likely?

Accepted Answer

Iron deficiency anemia

Question 3

Which plasma protein is primarily responsible for maintaining osmotic pressure in the blood?

Accepted Answer

Albumin

Question 4

What is the approximate pH range of human blood under normal physiological conditions?

Accepted Answer

$$7.35 - 7.45$$

Question 5

Which of the following best explains why a deficiency in vitamin B12 leads to pernicious anemia?

Accepted Answer

Vitamin B12 is necessary for DNA synthesis in developing erythrocytes

Question 6

Which type of leukocyte increases in number during a bacterial infection?

Accepted Answer

Neutrophils

Question 7

A patient with chronic kidney disease develops anemia. Which hormone deficiency is most likely responsible?

Accepted Answer

Erythropoietin

Question 8

Which of the following equations correctly represents cardiac output ($$CO$$)?

Accepted Answer

$$CO = Stroke\ Volume 	imes Heart\ Rate$$

Question 9

Which heart valve prevents backflow of blood from the left ventricle to the left atrium?

Accepted Answer

Mitral (bicuspid) valve

Question 10

A patient is diagnosed with right-sided heart failure. Which of the following symptoms is most likely to be observed?

Accepted Answer

Peripheral edema (swelling of legs and ankles)

Question 11

Which of the following best describes the function of the chordae tendineae in the heart?

Accepted Answer

They anchor the atrioventricular valves to the papillary muscles, preventing valve prolapse during ventricular contraction

Question 12

Which of the following is a major contributor to blood viscosity?

Accepted Answer

Red blood cell count

Question 13

During which phase of the cardiac cycle does ventricular filling occur?

Accepted Answer

Diastole

Question 14

Which of the following statements about the intrinsic conduction system of the heart is correct?

Accepted Answer

The sinoatrial (SA) node acts as the pacemaker of the heart

Question 15

Which of the following best explains the difference between systemic and pulmonary circulation?

Accepted Answer

Systemic circulation carries oxygenated blood from the left ventricle to the body, while pulmonary circulation carries deoxygenated blood from the right ventricle to the lungs

Question 16

A patient with a white blood cell count significantly below normal is said to have which condition?

Accepted Answer

Leukopenia

Question 17

Which of the following is a correct statement about the pericardium?

Accepted Answer

The fibrous pericardium anchors the heart to surrounding structures and prevents overfilling

Question 18

Which of the following best describes the effect of increased venous return on cardiac output, according to the Frank-Starling law?

Accepted Answer

Increased venous return increases cardiac output by stretching cardiac muscle fibers, leading to a stronger contraction

Question 19

Which of the following is a key difference between cardiac and skeletal muscle?

Accepted Answer

Cardiac muscle cells are connected by intercalated discs, allowing synchronized contraction

Question 20

Which of the following best describes the role of platelets in hemostasis?

Accepted Answer

They initiate the formation of a platelet plug and release chemicals that promote clotting

Blood and Cardiovascular System: Study Guide for Anatomy & Physiology

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