Q: Which of the following equations correctly represents the normal blood pH range?

$$7.35 \u003c \text{pH} \u003c 7.45$$

Question 1

Which of the following best describes the primary functions of blood in the human body?

Accepted Answer

Transport, protection, and regulation

Question 2

A blood sample is centrifuged and separates into three layers. Which layer contains the majority of the formed elements, and what is its approximate percentage of total blood volume?

Accepted Answer

Erythrocytes; about 45%

Question 3

Which plasma protein is most responsible for maintaining blood osmolarity and viscosity?

Accepted Answer

Albumin

Question 4

A patient with chronic kidney disease is likely to have reduced erythropoiesis. Which hormone is most directly affected, and what is its primary function?

Accepted Answer

Erythropoietin; stimulates red blood cell production

Question 5

Why do mature erythrocytes lack a nucleus and most organelles?

Accepted Answer

To increase their surface area for gas exchange and maximize hemoglobin content

Question 6

Which of the following equations correctly represents the normal blood pH range?

Accepted Answer

$$7.35 \u003c 	ext{pH} \u003c 7.45$$

Question 7

A patient with type B blood receives a transfusion of type A blood. What is the most likely outcome?

Accepted Answer

Agglutination of donor red blood cells due to anti-A antibodies in the recipient

Question 8

Which of the following best explains why red blood cells rely exclusively on anaerobic fermentation for ATP production?

Accepted Answer

They lack mitochondria

Question 9

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

Accepted Answer

Vascular spasm, platelet plug formation, coagulation

Question 10

A patient with type AB blood is considered a universal recipient for red blood cell transfusions. Why?

Accepted Answer

They have both A and B antigens and no anti-A or anti-B antibodies

Question 11

Which of the following best describes the difference between agglutination and coagulation?

Accepted Answer

Agglutination is the clumping of red blood cells by antibodies, while coagulation is the trapping of formed elements by fibrin

Question 12

Which of the following statements about leukocytes is correct?

Accepted Answer

They primarily reside in connective tissues and use the bloodstream for transport

Question 13

A patient with sickle-cell anemia has a mutation in the beta chain of hemoglobin. What is the primary consequence of this mutation?

Accepted Answer

Red blood cells become rigid and can block capillaries

Question 14

Which of the following best describes the role of fibrinogen in blood?

Accepted Answer

It is converted to fibrin during coagulation to form blood clots

Question 15

Which of the following is true regarding the Rh antigen in blood typing?

Accepted Answer

Rh-positive individuals have the Rh antigen on their red blood cells

Question 16

Which of the following best explains why plasma makes up about 55% of total blood volume?

Accepted Answer

Plasma is less dense than formed elements and contains mostly water

Question 17

A patient is found to have a hematocrit of 30%. What does this indicate?

Accepted Answer

The patient has a lower than normal percentage of red blood cells, possibly indicating anemia

Question 18

Which of the following best describes the process of leukopoiesis?

Accepted Answer

The production of white blood cells from hematopoietic stem cells

Question 19

Which of the following is a correct statement about the lifespan and turnover of red blood cells?

Accepted Answer

Red blood cells live for about 120 days and are replaced at a rate of 200 billion per day

Question 20

Which of the following best explains why type O blood is considered the universal donor for red blood cell transfusions?

Accepted Answer

Type O blood has no A or B antigens on the red blood cells

The Circulatory System: Blood – Structure, Function, and Clinical Relevance

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