Question 1

Which of the following best describes the primary function of erythrocytes (red blood cells) 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 pale skin, shortness of breath, and swelling of the tissues. Laboratory results show a decreased hematocrit and hemoglobin concentration. Which condition is most likely responsible for these symptoms?

Accepted Answer

Anemia

Question 3

Which plasma protein is most responsible for maintaining blood osmolarity and viscosity, and thus influences blood pressure and fluid balance?

Accepted Answer

Albumin

Question 4

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

Accepted Answer

Buffy coat

Question 5

Which of the following equations correctly represents the bicarbonate buffer system in blood?

Accepted Answer

$$\mathrm{H_2CO_3 \longleftrightarrow $$HCO_3$$^- + H^+}$$

Question 6

Which of the following best explains why a person with type O- blood is considered a universal donor?

Accepted Answer

Their erythrocytes lack A, B, and Rh antigens

Question 7

A woman who is Rh- becomes pregnant with an Rh+ fetus. Which of the following best describes the risk to her second Rh+ child if she does not receive Rh immune globulin?

Accepted Answer

Her antibodies may cross the placenta and destroy fetal erythrocytes, causing hemolytic disease of the newborn

Question 8

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

Accepted Answer

Vascular spasm, platelet plug formation, coagulation

Question 9

Which leukocyte is primarily responsible for phagocytizing bacteria and releasing antimicrobial chemicals?

Accepted Answer

Neutrophil

Question 10

A patient with iron-deficiency anemia is unable to synthesize adequate hemoglobin. Which of the following best explains why iron is essential for erythropoiesis?

Accepted Answer

Iron is a component of the heme group that binds oxygen in hemoglobin

Question 11

Which of the following best describes the process of erythropoiesis?

Accepted Answer

It is the production of red blood cells in the red bone marrow

Question 12

Which of the following statements about hemoglobin is correct?

Accepted Answer

Each hemoglobin molecule contains four heme groups, each with one iron atom that can bind one oxygen molecule

Question 13

Which of the following best explains why a decrease in erythrocyte count can lead to tissue hypoxia?

Accepted Answer

There is a reduced capacity to transport oxygen to tissues

Question 14

Which of the following is a function of platelets?

Accepted Answer

Initiating the formation of clot-dissolving enzymes

Question 15

A patient receives a transfusion of mismatched blood. Which of the following is most likely to occur?

Accepted Answer

Agglutination of donor erythrocytes by recipient antibodies

Question 16

Which of the following best describes the difference between serum and plasma?

Accepted Answer

Plasma contains clotting proteins, while serum does not

Question 17

Which of the following best explains the role of erythropoietin (EPO) in erythropoiesis?

Accepted Answer

EPO stimulates the production of erythrocytes in the bone marrow

Question 18

Which of the following best describes the function of basophils?

Accepted Answer

Secrete histamine to increase blood flow and heparin to prevent clotting

Question 19

A patient with sickle cell anemia has abnormal hemoglobin. Which of the following best explains the consequence of this condition?

Accepted Answer

Erythrocytes rupture prematurely, leading to hemolytic anemia

Question 20

Which of the following best describes the process of leukopoiesis?

Accepted Answer

Production of leukocytes from hemopoietic stem cells

Comprehensive Study Notes: Blood (Chapter 19) – Structure, Function, and Clinical Relevance

Study Guide - Practice Questions

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