Q: Which of the following is the correct formula for calculating hematocrit?

$$\text{Hematocrit} = \frac{\text{Volume of RBCs}}{\text{Total Blood Volume}} \times 100$$

Question 1

Which of the following best describes the primary function of erythrocytes in human blood?

Accepted Answer

Transporting oxygen from the lungs to body tissues

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 present?

Accepted Answer

Iron deficiency anemia

Question 3

Which plasma protein is most 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 the biconcave shape of red blood cells is advantageous?

Accepted Answer

It increases surface area for gas exchange and allows flexibility to pass through capillaries.

Question 6

A patient with chronic kidney disease is likely to have decreased production of which hormone, leading to anemia?

Accepted Answer

Erythropoietin

Question 7

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

Accepted Answer

Neutrophils

Question 8

Which of the following is the correct formula for calculating hematocrit?

Accepted Answer

$$	ext{Hematocrit} = \frac{	ext{Volume of RBCs}}{	ext{Total Blood Volume}} 	imes 100$$

Question 9

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

Accepted Answer

Red blood cell concentration

Question 10

A patient with a deficiency in vitamin B12 is most likely to develop which type of anemia?

Accepted Answer

Pernicious anemia

Question 11

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

Accepted Answer

They prevent the atrioventricular valves from inverting during ventricular contraction.

Question 12

Which of the following is the correct sequence of blood flow through the heart chambers, starting from the right atrium?

Accepted Answer

Right atrium → Right ventricle → Lungs → Left atrium → Left ventricle

Question 13

Which of the following statements about the myocardium is correct?

Accepted Answer

It is the thick, muscular middle layer of the heart responsible for contraction.

Question 14

Which of the following best describes the purpose of the semilunar valves?

Accepted Answer

They prevent backflow of blood from the arteries into the ventricles.

Question 15

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

Accepted Answer

Pulmonary edema

Question 16

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

Accepted Answer

Systemic circulation carries oxygenated blood to the body, while pulmonary circulation carries deoxygenated blood to the lungs.

Question 17

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

Accepted Answer

Both contain striations due to organized actin and myosin filaments.

Question 18

Which of the following best describes the effect of excessive stretching of cardiac muscle fibers on contractile force?

Accepted Answer

Contractile force decreases when fibers are stretched beyond their optimal length.

Question 19

Which of the following equations correctly represents cardiac output?

Accepted Answer

$$	ext{Cardiac Output} = 	ext{Stroke Volume} 	imes 	ext{Heart Rate}$$

Question 20

A patient with a white blood cell count significantly below normal is diagnosed with which condition?

Accepted Answer

Leukopenia

Blood and Cardiovascular System: Anatomy & Physiology Study Notes

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