Q: Which of the following equations correctly calculates hematocrit ($$HCT) as a $$percentage?

$$HCT = \frac{\text{Volume of erythrocytes}}{\text{Total blood volume}} \times 100$$

Question 1

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

Accepted Answer

Transporting oxygen from the lungs to tissues

Question 2

A patient with type AB blood needs a transfusion. Which blood type(s) can safely be donated to this patient, considering ABO compatibility?

Accepted Answer

Type A, type B, type AB, and type O

Question 3

Which formed element is most abundant in human blood?

Accepted Answer

Erythrocytes

Question 4

A person with blood type O negative is considered a universal donor. Which antigen(s) are present on their erythrocytes?

Accepted Answer

No A, B, or Rh antigens

Question 5

Which leukocyte is primarily responsible for producing antibodies?

Accepted Answer

Lymphocyte

Question 6

A hematocrit (HCT) test measures the percentage of which component in blood?

Accepted Answer

Erythrocytes

Question 7

Which plasma protein is most important for maintaining osmotic pressure in the blood?

Accepted Answer

Albumin

Question 8

A patient with a hematocrit value of 60% is most likely experiencing which condition?

Accepted Answer

Polycythemia

Question 9

Which of the following is a common cause of variation in hematocrit (HCT) values?

Accepted Answer

Dehydration

Question 10

Which leukocyte is most abundant in human blood and is primarily involved in phagocytosis of bacteria?

Accepted Answer

Neutrophil

Question 11

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

Accepted Answer

Hemolytic transfusion reaction due to anti-A antibodies

Question 12

Which plasma protein is essential for blood clotting?

Accepted Answer

Fibrinogen

Question 13

Which of the following equations correctly calculates hematocrit ($$HCT) as a $$percentage?

Accepted Answer

$$HCT = \frac{	ext{Volume of erythrocytes}}{	ext{Total blood volume}} 	imes 100$$

Question 14

Which leukocyte increases in number during allergic reactions and parasitic infections?

Accepted Answer

Eosinophil

Question 15

A newborn is at risk for hemolytic disease of the newborn (HDN) if the mother is Rh-negative and the baby is Rh-positive. What is the underlying cause?

Accepted Answer

Mother's anti-Rh antibodies attack fetal erythrocytes

Question 16

Which of the following best explains why type O blood is considered the universal donor for ABO blood types?

Accepted Answer

Type O blood contains no A or B antigens

Question 17

Which formed element is responsible for initiating the clotting process after a blood vessel injury?

Accepted Answer

Platelets

Question 18

A patient has a hematocrit of 30%. If their total blood volume is 5 liters, what is the volume of erythrocytes in their blood? Use the formula $$HCT = \frac{	ext{Volume of erythrocytes}}{	ext{Total blood volume}} 	imes 100.$$

Accepted Answer

1.5 liters

Question 19

Which leukocyte is least abundant in human blood and releases histamine during inflammatory responses?

Accepted Answer

Basophil

Question 20

Which plasma protein group includes antibodies that help defend against pathogens?

Accepted Answer

Globulins

Blood: Structure, Function, and Laboratory Analysis

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