Which of the following are classified as killer, helper, memory, and suppressor?
RBCS
T cells
B cells
Platelets
Which of the following are classified as killer, helper, memory, and suppressor?
The Correct Answer is A
A. RBCs:
Red blood cells (RBCs) carry oxygen and have no role in the immune response.
B. T cells:
T cells are classified into subsets like cytotoxic (killer), helper, memory, and suppressor (regulatory) T cells, each with specialized immune functions.
C. B cells:
While B cells also have memory capabilities and produce antibodies, they are not categorized into killer or suppressor types.
D. Platelets:
Platelets are involved in blood clotting, not immunity.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
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.
Correct Answer is C
Explanation
A. The failure of the body to function normally
This is too general and applies to any illness, not specifically infection.
B. A diseased section of the body
This is vague and doesn’t identify causative factors like pathogens.
C. The invasion of the body by a pathogen and the subsequent symptoms in response to the invasion
This accurately defines infection as a host response to pathogen invasion.
D. The invasion of the body by a disease
Diseases don’t invade; pathogens do. This option is not scientifically accurate.
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