Q: Which of the following equations correctly represents the calculation of hematocrit ($$Hct) as a $$percentage?

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

Question 1

Which of the following best explains why blood is classified as a connective tissue?

Accepted Answer

Because it is composed of cells suspended in a liquid matrix and connects body systems by transporting substances.

Question 2

A patient’s blood sample is centrifuged. The resulting tube shows a hematocrit of 60%. What does this indicate?

Accepted Answer

The patient has a higher than normal percentage of erythrocytes, possibly indicating polycythemia.

Question 3

Which of the following is NOT a function of blood?

Accepted Answer

Producing hormones for the endocrine system

Question 4

Which formed element is primarily responsible for gas transport in the blood?

Accepted Answer

Erythrocytes

Question 5

A blood smear shows a cell with a bi-lobed nucleus and red-stained granules. What is the most likely identity and function of this cell?

Accepted Answer

Eosinophil; digests parasitic worms and participates in immune response

Question 6

Which of the following best describes the process of diapedesis?

Accepted Answer

The movement of leukocytes out of capillaries into tissues

Question 7

A patient with type B blood can safely receive which of the following blood types?

Accepted Answer

Type B and Type O

Question 8

Which of the following statements about Rh blood groups is correct?

Accepted Answer

Rh+ indicates the presence of the D antigen.

Question 9

A woman who is Rh– becomes pregnant with an Rh+ fetus. What is the risk in subsequent pregnancies if she is not treated?

Accepted Answer

She will develop anti-Rh antibodies that can attack the RBCs of a future Rh+ fetus, causing hemolytic disease of the newborn.

Question 10

Which of the following best describes the role of platelets in hemostasis?

Accepted Answer

They are cell fragments that are crucial for blood clotting.

Question 11

A blood sample agglutinates with both anti-A and anti-B sera but not with anti-Rh serum. What is the blood type?

Accepted Answer

Type AB–

Question 12

Which leukocyte is most abundant in a normal differential WBC count and is highly phagocytic?

Accepted Answer

Neutrophil

Question 13

A patient with type O blood is considered a universal donor. Why?

Accepted Answer

Type O blood contains neither A nor B antigens, so it does not react with anti-A or anti-B antibodies in recipients.

Question 14

Which of the following equations correctly represents the calculation of hematocrit ($$Hct) as a $$percentage?

Accepted Answer

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

Question 15

Which cell type is crucial for specific immunity and is found mostly in lymphoid tissue?

Accepted Answer

Lymphocyte

Question 16

A patient receives a transfusion of mismatched blood and develops a transfusion reaction. Which component of the immune system is primarily responsible for this reaction?

Accepted Answer

Plasma antibodies (agglutinins) reacting with donor RBC antigens

Question 17

Which of the following best describes the function of monocytes after they leave the bloodstream?

Accepted Answer

They differentiate into macrophages and are crucial in phagocytosis.

Question 18

A laboratory procedure requires the use of Wright’s stain. Which safety precaution is most important during this procedure?

Accepted Answer

Do not allow the stain to contact your skin, as it is hazardous.

Question 19

Which of the following best explains why infants begin to develop agglutinins (antibodies) at 2–6 months of age?

Accepted Answer

Agglutinins are produced in response to exposure to environmental antigens after birth.

Blood: Composition, Functions, and Clinical Relevance

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