Q: If a patient has a total blood volume of 5 liters, approximately how much of this volume is plasma?

$$5 \times 0.55 = 2.75$$ liters

Q: Which formula is used to calculate the packed cell volume (PCV) or hematocrit in a blood sample?

$$\text{PCV} = (C/A) \times 100$$

Question 1

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

Accepted Answer

To transport gases, nutrients, wastes, hormones, and immunity factors throughout the body

Question 2

Whole blood is composed of which two main components?

Accepted Answer

Formed elements and plasma

Question 3

If a patient has a total blood volume of 5 liters, approximately how much of this volume is plasma?

Accepted Answer

$$5 	imes 0.55 = 2.75$$ liters

Question 4

Which formula is used to calculate the packed cell volume (PCV) or hematocrit in a blood sample?

Accepted Answer

$$	ext{PCV} = (C/A) 	imes 100$$

Question 5

Which of the following is NOT a function of blood plasma proteins?

Accepted Answer

Carrying oxygen directly to tissues

Question 6

A patient with a hematocrit of 60% is most likely experiencing which condition?

Accepted Answer

Polycythemia

Question 7

Which of the following blood cell types is primarily responsible for transporting oxygen?

Accepted Answer

Erythrocytes

Question 8

Which plasma protein is most abundant and helps maintain colloid osmotic pressure?

Accepted Answer

Albumin

Question 9

If a blood sample contains 45% red blood cells, 1% buffy coat, and 54% plasma, what is the hematocrit?

Accepted Answer

$$45\%$$

Question 10

Which of the following is a correct statement about the closed circulatory system?

Accepted Answer

Blood is confined to heart and vessels, allowing direct interaction with all other systems

Question 11

Which of the following is a function of the cardiovascular system in maintaining homeostasis?

Accepted Answer

Regulating body temperature, pH, and blood pressure

Question 12

Which of the following best explains why plasma is considered a connective tissue?

Accepted Answer

It consists of cells suspended in a liquid matrix

Question 13

Which of the following statements about blood composition is correct?

Accepted Answer

Plasma makes up about 55% of whole blood volume

Question 14

A patient loses a significant amount of blood. Which component of the cardiovascular system is most directly affected in terms of oxygen transport?

Accepted Answer

Erythrocytes

Question 15

Which of the following is a correct calculation for the percentage of plasma in a blood sample if the total volume is 10 mL and the plasma volume is 5.5 mL?

Accepted Answer

$$(5.5/10) 	imes 100 = 55\%$$

Question 16

Which of the following is NOT a function of the cardiovascular system?

Accepted Answer

Producing insulin

Question 17

Which of the following statements about the buffy coat in a centrifuged blood sample is correct?

Accepted Answer

It consists of leukocytes and platelets

Question 18

Which of the following is a correct description of the role of blood in immunity?

Accepted Answer

Blood transports antibodies and immune cells to sites of infection

Question 19

Which of the following is the correct percentage of body weight that blood typically represents?

Accepted Answer

Approximately 8%

Question 20

Which of the following is a correct statement about the transport of gases by blood?

Accepted Answer

Carbon dioxide is transported both dissolved in plasma and bound to hemoglobin

Cardiovascular System: Structure, Function, and Blood Composition

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