Q: Which of the following equations correctly represents the calculation of hematocrit?

$$\text{Hematocrit} = \frac{\text{Volume of erythrocytes}}{\text{Total blood volume}} \times 100$$

Question 1

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

Accepted Answer

To transport oxygen and carbon dioxide between the lungs and tissues

Question 2

A patient presents with fatigue, pallor, and shortness of breath. Laboratory results show decreased hemoglobin and hematocrit. Which type of anemia is most likely if the patient also has a history of chronic blood loss?

Accepted Answer

Iron-deficiency anemia

Question 3

Which of the following is the correct sequence of events in hemostasis?

Accepted Answer

Vascular spasm → Platelet plug formation → Coagulation → Clot retraction → Thrombolysis

Question 4

A blood sample is centrifuged and separates into three layers. Which layer contains the majority of leukocytes and platelets?

Accepted Answer

The buffy coat

Question 5

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

Accepted Answer

Albumin

Question 6

A patient with hemophilia is likely to have which of the following problems?

Accepted Answer

Deficiency in specific clotting factors

Question 7

Which leukocyte is most numerous in normal blood and is primarily responsible for phagocytosis of bacteria?

Accepted Answer

Neutrophil

Question 8

A patient with a high hematocrit is most likely experiencing which condition?

Accepted Answer

Polycythemia

Question 9

Which of the following best explains why erythrocytes have a biconcave shape?

Accepted Answer

To maximize surface area for gas exchange

Question 10

Which of the following equations correctly represents the calculation of hematocrit?

Accepted Answer

$$	ext{Hematocrit} = \frac{	ext{Volume of erythrocytes}}{	ext{Total blood volume}} 	imes 100$$

Question 11

A patient with jaundice is most likely experiencing an accumulation of which substance in the blood?

Accepted Answer

Bilirubin

Question 12

Which of the following best describes the role of thrombopoietin?

Accepted Answer

Stimulates platelet production from megakaryocytes

Question 13

A patient with a moving blood clot is at risk for which condition?

Accepted Answer

Embolus

Question 14

Which of the following is a function of B lymphocytes?

Accepted Answer

Produce antibodies

Question 15

A patient with infectious mononucleosis is most likely to have an increase in which type of leukocyte?

Accepted Answer

Lymphocytes

Question 16

Which of the following best explains why a deficiency in vitamin K can lead to bleeding disorders?

Accepted Answer

Vitamin K is required for the synthesis of several clotting factors

Question 17

Which of the following best describes the process of diapedesis?

Accepted Answer

The movement of leukocytes out of the bloodstream into tissues

Question 18

A patient with chronic liver disease is at increased risk for bleeding because the liver is responsible for producing:

Accepted Answer

Clotting factors

Question 19

Which of the following best describes the role of the spleen in erythrocyte life cycle?

Accepted Answer

It removes old and damaged erythrocytes from circulation

Question 20

A patient with sickle cell disease is at risk for which of the following complications?

Accepted Answer

Blockage of small blood vessels due to abnormally shaped erythrocytes

Chapter 19: The Cardiovascular System – Blood

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