Question 1

Which of the following best describes the main function of erythrocytes in human blood?

Accepted Answer

They transport oxygen from the lungs to body tissues and facilitate carbon dioxide removal.

Question 2

A patient with type B blood receives a transfusion of type A blood. Which immune response is most likely to occur?

Accepted Answer

The recipient's anti-A antibodies will attack the donor's A antigens, causing hemolysis.

Question 3

Which of the following blood components is correctly matched with its function?

Accepted Answer

Eosinophils – fight parasites and appear after allergic reactions

Question 4

A laboratory technician observes a white blood cell with a bilobed nucleus and red-staining cytoplasmic granules. Which cell type is this?

Accepted Answer

Eosinophil

Question 5

Which of the following statements about blood plasma is correct?

Accepted Answer

It is a clear, light yellow fluid that serves as the matrix of blood.

Question 6

A person with blood type AB- needs a transfusion. Which of the following blood types can safely be donated to this person?

Accepted Answer

O-

Question 7

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

Accepted Answer

It lacks A, B, and Rh antigens, so recipient antibodies do not react with it.

Question 8

Which of the following is a correct match between a leukocyte and its primary function?

Accepted Answer

Monocyte – clean-up of cellular debris

Question 9

A blood smear shows a cell with an S-shaped nucleus and dark purple-staining granules. What is the most likely identity of this cell?

Accepted Answer

Basophil

Question 10

Which of the following best describes the process and purpose of leuko-reduction in blood transfusions?

Accepted Answer

It removes white blood cells to reduce the risk of immune reactions in the recipient.

Question 11

A patient with type O+ blood can safely receive blood from which of the following donors?

Accepted Answer

O-

Question 12

Which of the following is true regarding the antigens and antibodies present in a person with type A blood?

Accepted Answer

A antigens on RBCs and anti-B antibodies in plasma

Question 13

A patient is found to have a high number of lymphocytes in their blood. Which of the following is the most likely explanation?

Accepted Answer

They are mounting an immune response to a viral infection.

Question 14

Which of the following best describes the appearance of a monocyte under a microscope?

Accepted Answer

U-shaped nucleus with light blue to purple cytoplasm

Question 15

If a person with type AB+ blood receives a transfusion from a type O- donor, what is the expected outcome?

Accepted Answer

No transfusion reaction will occur because O- blood lacks A, B, and Rh antigens.

Question 16

Which of the following best explains why transfusing incompatible blood types can be life-threatening?

Accepted Answer

The recipient's antibodies attack the donor's antigens, causing hemolysis and possible kidney failure.

Question 17

Which of the following is a correct sequence for the separation of blood components during centrifugation?

Accepted Answer

Plasma at the top, buffy coat in the middle, erythrocytes at the bottom

Question 18

A patient with type O- blood needs a transfusion. Which of the following blood types can they safely receive?

Accepted Answer

O-

Question 19

Which of the following best describes the function of platelets in the blood?

Accepted Answer

They are involved in blood clotting by forming plugs at sites of vessel injury.

Question 20

A patient with a severe allergic reaction is found to have an increased number of which type of leukocyte?

Accepted Answer

Eosinophils

Blood: Components, Properties, and Blood Typing

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