BIOS 150 Week 5 Quiz Exam 3 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. What is the primary function of the immune system?
A. Digestion
B. Defense against pathogens
C. Respiration
D. Circulation
Correct Answer: B. Defense against pathogens
Rationale: The immune system protects the body from infections and
foreign invaders.
2. What are pathogens?
A. Body cells
B. Disease-causing organisms
C. Hormones
D. Enzymes
Correct Answer: B. Disease-causing organisms
Rationale: Pathogens include bacteria, viruses, fungi, and parasites.
,3. What is the first line of defense in the immune system?
A. Antibodies
B. Skin and mucous membranes
C. White blood cells
D. Vaccines
Correct Answer: B. Skin and mucous membranes
Rationale: These act as physical barriers preventing entry of
pathogens.
4. What type of immunity is present at birth?
A. Acquired immunity
B. Innate immunity
C. Passive immunity
D. Artificial immunity
Correct Answer: B. Innate immunity
Rationale: It is the natural defense system present from birth.
5. What is adaptive immunity?
A. Inborn immunity
B. Immunity developed after exposure
C. Physical barrier
D. Chemical barrier
Correct Answer: B. Immunity developed after exposure
Rationale: It develops after encountering specific pathogens.
,6. What are white blood cells called?
A. Erythrocytes
B. Leukocytes
C. Platelets
D. Neurons
Correct Answer: B. Leukocytes
Rationale: Leukocytes fight infections.
7. What is the function of antibodies?
A. Destroy red cells
B. Bind to antigens
C. Transport oxygen
D. Digest food
Correct Answer: B. Bind to antigens
Rationale: Antibodies help neutralize pathogens.
8. What is an antigen?
A. Antibody
B. Foreign substance triggering immune response
C. Hormone
D. Enzyme
Correct Answer: B. Foreign substance triggering immune
response
Rationale: Antigens stimulate antibody production.
, 9. What cells produce antibodies?
A. T cells
B. B cells
C. Red blood cells
D. Platelets
Correct Answer: B. B cells
Rationale: B lymphocytes produce antibodies.
10. What is the role of T cells?
A. Produce hormones
B. Destroy infected cells
C. Carry oxygen
D. Digest proteins
Correct Answer: B. Destroy infected cells
Rationale: T cells attack infected or abnormal cells.
11. What is vaccination?
A. Treatment
B. Introduction of weakened pathogen
C. Surgery
D. Infection
Correct Answer: B. Introduction of weakened pathogen
Rationale: Stimulates immune response without causing disease.
12. What is immunity gained from vaccines?
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. What is the primary function of the immune system?
A. Digestion
B. Defense against pathogens
C. Respiration
D. Circulation
Correct Answer: B. Defense against pathogens
Rationale: The immune system protects the body from infections and
foreign invaders.
2. What are pathogens?
A. Body cells
B. Disease-causing organisms
C. Hormones
D. Enzymes
Correct Answer: B. Disease-causing organisms
Rationale: Pathogens include bacteria, viruses, fungi, and parasites.
,3. What is the first line of defense in the immune system?
A. Antibodies
B. Skin and mucous membranes
C. White blood cells
D. Vaccines
Correct Answer: B. Skin and mucous membranes
Rationale: These act as physical barriers preventing entry of
pathogens.
4. What type of immunity is present at birth?
A. Acquired immunity
B. Innate immunity
C. Passive immunity
D. Artificial immunity
Correct Answer: B. Innate immunity
Rationale: It is the natural defense system present from birth.
5. What is adaptive immunity?
A. Inborn immunity
B. Immunity developed after exposure
C. Physical barrier
D. Chemical barrier
Correct Answer: B. Immunity developed after exposure
Rationale: It develops after encountering specific pathogens.
,6. What are white blood cells called?
A. Erythrocytes
B. Leukocytes
C. Platelets
D. Neurons
Correct Answer: B. Leukocytes
Rationale: Leukocytes fight infections.
7. What is the function of antibodies?
A. Destroy red cells
B. Bind to antigens
C. Transport oxygen
D. Digest food
Correct Answer: B. Bind to antigens
Rationale: Antibodies help neutralize pathogens.
8. What is an antigen?
A. Antibody
B. Foreign substance triggering immune response
C. Hormone
D. Enzyme
Correct Answer: B. Foreign substance triggering immune
response
Rationale: Antigens stimulate antibody production.
, 9. What cells produce antibodies?
A. T cells
B. B cells
C. Red blood cells
D. Platelets
Correct Answer: B. B cells
Rationale: B lymphocytes produce antibodies.
10. What is the role of T cells?
A. Produce hormones
B. Destroy infected cells
C. Carry oxygen
D. Digest proteins
Correct Answer: B. Destroy infected cells
Rationale: T cells attack infected or abnormal cells.
11. What is vaccination?
A. Treatment
B. Introduction of weakened pathogen
C. Surgery
D. Infection
Correct Answer: B. Introduction of weakened pathogen
Rationale: Stimulates immune response without causing disease.
12. What is immunity gained from vaccines?
