BIOS 256 WEEK 5 QUIZ EXAM 4
(Latest Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A –
Chamberlain
1. What is the main function of red blood cells?
A. Fight infections
B. Carry oxygen
C. Produce antibodies
D. Release histamine
Correct Answer: B
Rationale: Red blood cells contain hemoglobin, which binds and
transports oxygen to tissues.
2. Which WBC is the most abundant in normal blood?
A. Lymphocytes
B. Neutrophils
C. Eosinophils
D. Basophils
,Correct Answer: B
Rationale: Neutrophils make up 50–70% of white blood cells and
respond rapidly to bacterial infections.
3. Which WBC increases during parasitic infections?
A. Neutrophils
B. Eosinophils
C. Lymphocytes
D. Monocytes
Correct Answer: B
Rationale: Eosinophils release toxic granules that combat
multicellular parasites.
4. Which WBC releases histamine during allergic reactions?
A. Basophils
B. Eosinophils
C. Neutrophils
D. Monocytes
Correct Answer: A
Rationale: Basophils release histamine to promote inflammation
and vascular permeability.
5. Which WBC produces antibodies?
,A. B cells
B. T cells
C. NK cells
D. Monocytes
Correct Answer: A
Rationale: B cells differentiate into plasma cells that secrete
antibodies against specific antigens.
6. Which WBC matures in the thymus?
A. B cells
B. T cells
C. NK cells
D. Monocytes
Correct Answer: B
Rationale: T cells mature in the thymus to perform cellular
immunity.
7. Which WBC attacks virus-infected cells without prior
exposure?
A. B cells
B. T cells
C. NK cells
D. Monocytes
, Correct Answer: C
Rationale: NK cells are part of innate immunity and destroy
abnormal or virus-infected cells spontaneously.
8. Which plasma protein maintains osmotic pressure?
A. Albumin
B. Globulin
C. Fibrinogen
D. Hemoglobin
Correct Answer: A
Rationale: Albumin prevents fluid loss from capillaries,
maintaining blood volume and pressure.
9. Which plasma protein is converted to fibrin during clotting?
A. Albumin
B. Globulin
C. Fibrinogen
D. Hemoglobin
Correct Answer: C
Rationale: Fibrinogen is cleaved by thrombin to form fibrin, which
creates a blood clot.
10. Which WBC is the first responder to bacterial infections?
(Latest Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A –
Chamberlain
1. What is the main function of red blood cells?
A. Fight infections
B. Carry oxygen
C. Produce antibodies
D. Release histamine
Correct Answer: B
Rationale: Red blood cells contain hemoglobin, which binds and
transports oxygen to tissues.
2. Which WBC is the most abundant in normal blood?
A. Lymphocytes
B. Neutrophils
C. Eosinophils
D. Basophils
,Correct Answer: B
Rationale: Neutrophils make up 50–70% of white blood cells and
respond rapidly to bacterial infections.
3. Which WBC increases during parasitic infections?
A. Neutrophils
B. Eosinophils
C. Lymphocytes
D. Monocytes
Correct Answer: B
Rationale: Eosinophils release toxic granules that combat
multicellular parasites.
4. Which WBC releases histamine during allergic reactions?
A. Basophils
B. Eosinophils
C. Neutrophils
D. Monocytes
Correct Answer: A
Rationale: Basophils release histamine to promote inflammation
and vascular permeability.
5. Which WBC produces antibodies?
,A. B cells
B. T cells
C. NK cells
D. Monocytes
Correct Answer: A
Rationale: B cells differentiate into plasma cells that secrete
antibodies against specific antigens.
6. Which WBC matures in the thymus?
A. B cells
B. T cells
C. NK cells
D. Monocytes
Correct Answer: B
Rationale: T cells mature in the thymus to perform cellular
immunity.
7. Which WBC attacks virus-infected cells without prior
exposure?
A. B cells
B. T cells
C. NK cells
D. Monocytes
, Correct Answer: C
Rationale: NK cells are part of innate immunity and destroy
abnormal or virus-infected cells spontaneously.
8. Which plasma protein maintains osmotic pressure?
A. Albumin
B. Globulin
C. Fibrinogen
D. Hemoglobin
Correct Answer: A
Rationale: Albumin prevents fluid loss from capillaries,
maintaining blood volume and pressure.
9. Which plasma protein is converted to fibrin during clotting?
A. Albumin
B. Globulin
C. Fibrinogen
D. Hemoglobin
Correct Answer: C
Rationale: Fibrinogen is cleaved by thrombin to form fibrin, which
creates a blood clot.
10. Which WBC is the first responder to bacterial infections?
