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

$\frac{\text{Volume of RBCs}}{\text{Total Blood Volume}} \times 100$

Question 1

Which of the following best explains why erythrocytes (RBCs) are biconcave in shape?

Accepted Answer

It increases their surface area for gas exchange and allows flexibility to pass through capillaries.

Question 2

A patient’s blood sample shows a high percentage of neutrophils with multilobed nuclei and pale red cytoplasmic granules. What is the most likely function of these cells?

Accepted Answer

Phagocytosis of pathogens and debris

Question 3

Which leukocyte is primarily responsible for killing parasitic worms and plays a role in allergy and asthma?

Accepted Answer

Eosinophil

Question 4

A blood sample is tested with Anti-A and Anti-B sera. Agglutination occurs with Anti-B serum only. What is the blood type?

Accepted Answer

Type B

Question 5

Which of the following statements about hemoglobin is correct?

Accepted Answer

It is a protein in erythrocytes that transports oxygen and carbon dioxide.

Question 6

A person with blood type O negative ($O^-$) can safely donate blood to which of the following recipients?

Accepted Answer

Any ABO and Rh blood type (universal donor)

Question 7

Which of the following is NOT a step in the process of hemostasis?

Accepted Answer

Antibody production

Question 8

A patient’s hematocrit is measured at 60%. What does this indicate?

Accepted Answer

The percentage of red blood cells in the blood is higher than normal.

Question 9

Which leukocyte has a U or kidney-shaped nucleus and gray-blue cytoplasm, and is involved in phagocytosis?

Accepted Answer

Monocyte

Question 10

If a person’s blood type is AB+, which antigens are present on their erythrocytes?

Accepted Answer

A, B, and Rh antigens

Question 11

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

Accepted Answer

$\frac{	ext{Volume of RBCs}}{	ext{Total Blood Volume}} 	imes 100$

Question 12

Which cell type is most numerous in a normal blood smear?

Accepted Answer

Erythrocytes (RBCs)

Question 13

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

Accepted Answer

Agglutination and hemolysis of donor RBCs

Question 14

Which of the following best describes the function of basophils?

Accepted Answer

Release histamine and heparin during inflammatory responses

Question 15

Which of the following is true regarding lymphocytes?

Accepted Answer

They mount immune responses by direct cell attack or antibody production.

Question 16

A person is found to have anti-A and anti-B antibodies in their plasma. What is their blood type?

Accepted Answer

Type O

Question 17

Which of the following best explains the difference between Rh+ and Rh- blood types?

Accepted Answer

Rh+ blood has the Rh antigen; Rh- blood does not.

Question 18

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

Accepted Answer

Vascular spasm → Platelet plug formation → Coagulation

Question 19

Which of the following best describes the role of plasma antibodies in blood typing?

Accepted Answer

They react against RBCs carrying antigens not present in the person's own RBCs.

Question 20

A patient’s blood sample shows a large number of lymphocytes with spherical nuclei and blue cytoplasm. What is the most likely function of these cells?

Accepted Answer

Mounting immune responses by direct cell attack or antibody production

Blood Cells, Blood Typing, and Hemostasis: Study Notes for Anatomy & Physiology

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