Q: Which of the following equations best represents the relationship between the volume of plasma and the total blood volume in an average adult male, given that plasma makes up approximately 55% of blood volume and the average total blood volume is 5.6 L?

$$V_{plasma} = 0.55 \times 5.6$$

Question 1

Which of the following best describes the primary function of red blood cells (RBCs) in the cardiovascular system?

Accepted Answer

They transport oxygen and carbon dioxide between the lungs and tissues.

Question 2

A patient with blood type B- requires a transfusion. Which of the following donor blood types would be safest to administer?

Accepted Answer

O-

Question 3

Which of the following statements about plasma is CORRECT?

Accepted Answer

Plasma is about 91-92% water and contains proteins, nutrients, and waste products.

Question 4

A person with type AB+ blood is considered a universal recipient for red blood cell transfusions. Why is this the case?

Accepted Answer

They have A, B, and Rh antigens on their RBCs and lack anti-A, anti-B, and anti-Rh antibodies.

Question 5

Which of the following best explains why agglutination is dangerous during a mismatched blood transfusion?

Accepted Answer

Agglutination leads to clumping of RBCs, which can block small blood vessels and cause kidney failure.

Question 6

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

Accepted Answer

Synthesis of hormones

Question 7

A woman with blood type O- is pregnant with a fetus who is Rh+. Why might this be a concern in later pregnancies?

Accepted Answer

She may develop anti-Rh antibodies after exposure, which can cross the placenta and attack the RBCs of an Rh+ fetus in future pregnancies.

Question 8

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

Accepted Answer

Plasma contains clotting factors, while serum does not.

Question 9

A patient has a high eosinophil count. Which of the following conditions is most likely associated with this finding?

Accepted Answer

Parasitic infection or allergic reaction

Question 10

Which of the following steps is NOT part of the process of hemostasis?

Accepted Answer

Hemoglobin synthesis

Question 11

Which of the following white blood cells is classified as an agranulocyte?

Accepted Answer

Lymphocyte

Question 12

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

Accepted Answer

Agglutination, because the recipient's anti-B antibodies will react with the B antigens on donor RBCs.

Question 13

Which of the following best describes the role of platelets (thrombocytes) in the body?

Accepted Answer

They initiate the process of hemostasis by forming a temporary plug at the site of blood vessel injury.

Question 14

Which of the following equations best represents the relationship between the volume of plasma and the total blood volume in an average adult male, given that plasma makes up approximately 55% of blood volume and the average total blood volume is 5.6 L?

Accepted Answer

$$V_{plasma} = 0.55 	imes 5.6$$

Question 15

Which of the following statements about hemoglobin is TRUE?

Accepted Answer

Hemoglobin is found in RBCs and binds oxygen and carbon dioxide for transport.

Question 16

A patient with type O- blood is considered a universal donor for red blood cell transfusions. Which of the following best explains why?

Accepted Answer

Their RBCs lack A, B, and Rh antigens, so they are less likely to trigger an immune response in recipients.

Question 17

Which of the following best describes the function of lymphocytes?

Accepted Answer

They are agranulocytes involved in specific immune responses, such as producing antibodies.

Question 18

Which of the following scenarios would most likely result in the production of anti-Rh antibodies in a patient?

Accepted Answer

A person with Rh- blood receives Rh+ blood for the first time.

Question 19

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

Accepted Answer

Vascular spasm, platelet plug formation, coagulation

Question 20

Which of the following best explains why a person with type A blood does NOT have anti-A antibodies in their plasma?

Accepted Answer

Their immune system recognizes A antigens as 'self' and does not produce antibodies against them.

Cardiovascular System and Blood: Structure, Function, and Clinical Relevance

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