1. What is the primary function of the lymphatic system?
A. To transport oxygen to tissues
B. To filter blood and remove waste
C. To transport immune cells and absorb fat from the digestive
system
D. To produce red blood cells
Answer: c) To transport immune cells and absorb fat from the
digestive system
Rationale: The lymphatic system helps transport immune cells
(e.g., lymphocytes) and absorbs fats from the digestive tract,
supporting immune responses and nutrient transport.
2. What is an antigen?
A. A cell that produces antibodies
B. A foreign molecule that stimulates an immune response
C. A protein found in red blood cells
D. A molecule that suppresses immune activity
Answer: b) A foreign molecule that stimulates an immune
response
,Rationale: An antigen is any substance that the immune system
recognizes as foreign and responds to, typically by producing
antibodies.
3. What is the characteristic of type IV hypersensitivity?
A. IgE-mediated immediate response
B. Formation of immune complexes
C. Delayed response mediated by T cells
D. Complement activation
Answer: c) Delayed response mediated by T cells
Rationale: Type IV hypersensitivity involves delayed reactions
where T cells are responsible for the immune response, such as in
contact dermatitis or the tuberculin skin test.
4. What type of cells are responsible for the rejection of
transplanted tissues?
A. B cells
B. Helper T cells
C. Cytotoxic T cells
D. Macrophages
Answer: c) Cytotoxic T cells
, Rationale: Cytotoxic T cells recognize and destroy cells that are
foreign to the body, including transplanted tissues, leading to
rejection.
5. Which of the following is a characteristic of the inflammatory
response?
A. It is always harmful to the body
B. It results in vasodilation and increased blood flow
C. It involves the release of antibodies
D. It leads to the immediate elimination of pathogens
Answer: b) It results in vasodilation and increased blood flow
Rationale: Inflammation is a protective response that involves
vasodilation and increased blood flow to the affected area,
bringing immune cells to fight infection.
6. What is the role of natural killer (NK) cells in the immune
system?
A. To produce antibodies
B. To directly destroy infected or cancerous cells
C. To present antigens to T cells
D. To produce cytokines
Answer: b) To directly destroy infected or cancerous cells
A. To transport oxygen to tissues
B. To filter blood and remove waste
C. To transport immune cells and absorb fat from the digestive
system
D. To produce red blood cells
Answer: c) To transport immune cells and absorb fat from the
digestive system
Rationale: The lymphatic system helps transport immune cells
(e.g., lymphocytes) and absorbs fats from the digestive tract,
supporting immune responses and nutrient transport.
2. What is an antigen?
A. A cell that produces antibodies
B. A foreign molecule that stimulates an immune response
C. A protein found in red blood cells
D. A molecule that suppresses immune activity
Answer: b) A foreign molecule that stimulates an immune
response
,Rationale: An antigen is any substance that the immune system
recognizes as foreign and responds to, typically by producing
antibodies.
3. What is the characteristic of type IV hypersensitivity?
A. IgE-mediated immediate response
B. Formation of immune complexes
C. Delayed response mediated by T cells
D. Complement activation
Answer: c) Delayed response mediated by T cells
Rationale: Type IV hypersensitivity involves delayed reactions
where T cells are responsible for the immune response, such as in
contact dermatitis or the tuberculin skin test.
4. What type of cells are responsible for the rejection of
transplanted tissues?
A. B cells
B. Helper T cells
C. Cytotoxic T cells
D. Macrophages
Answer: c) Cytotoxic T cells
, Rationale: Cytotoxic T cells recognize and destroy cells that are
foreign to the body, including transplanted tissues, leading to
rejection.
5. Which of the following is a characteristic of the inflammatory
response?
A. It is always harmful to the body
B. It results in vasodilation and increased blood flow
C. It involves the release of antibodies
D. It leads to the immediate elimination of pathogens
Answer: b) It results in vasodilation and increased blood flow
Rationale: Inflammation is a protective response that involves
vasodilation and increased blood flow to the affected area,
bringing immune cells to fight infection.
6. What is the role of natural killer (NK) cells in the immune
system?
A. To produce antibodies
B. To directly destroy infected or cancerous cells
C. To present antigens to T cells
D. To produce cytokines
Answer: b) To directly destroy infected or cancerous cells
