A vaccine:
Gives active artificial immunity
Is a gamma globulin
Contains antibodies
Gives active natural immunity
The Correct Answer is A
A. Gives active artificial immunity
Vaccines stimulate the body’s immune system to produce antibodies and memory cells, creating active immunity artificially.
B. Is a gamma globulin
Gamma globulin is a preparation of antibodies used for passive immunity, not a vaccine.
C. Contains antibodies
Vaccines usually contain antigens (weakened or inactivated parts of a pathogen), not antibodies.
D. Gives active natural immunity
Active natural immunity is obtained through actual infection, not vaccination.
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Related Questions
Correct Answer is C
Explanation
A. Specific immunity: B cells, T cells:
B cells and T cells are part of the adaptive (specific) immune system.
B. Mechanical barriers: skin, mucous membrane:
These are physical defenses against infection.
C. Chemical barriers: tears, saliva, stomach acid, B cells, T cells:
Tears, saliva, and stomach acid are chemical barriers. B cells and T cells are not chemical barriers; they are components of specific immunity.
D. First line of defense: skin, mucous membrane, tears, sneezing:
These are all part of the body's innate first-line defenses.
Correct Answer is B
Explanation
A. Skin:
The skin is part of the first line of defense, acting as a physical barrier.
B. Phagocytosis:
Phagocytosis, carried out by white blood cells like macrophages and neutrophils, is a component of the second line of defense, which includes non-specific internal immune responses.
C. Coughing:
Coughing is part of the first line of defense-mechanical clearance.
D. Sneezing:
Like coughing, sneezing is a mechanical defense included in the first line.
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