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 A
Explanation
A. Tonsils:
Tonsils are lymphatic tissues located in the pharyngeal region; they are partially encapsulated and help trap airborne or ingested pathogens.
B. Thyroid gland:
The thyroid is an endocrine gland that regulates metabolism, not part of the lymphatic system.
C. Thymus gland:
The thymus is fully encapsulated and located in the mediastinum; it matures T cells.
D. Spleen:
The spleen is a fully encapsulated lymphoid organ located in the left upper quadrant of the abdomen.
Correct Answer is ["A","B","C","D"]
Explanation
A. Inhalation of an infectious pathogen
Respiratory droplets or airborne pathogens (e.g., influenza, tuberculosis) can be inhaled and cause infection.
B. Ingestion of an infectious pathogen
Infections like salmonella or norovirus are spread through contaminated food or water.
C. Contact with infected body fluids
Bloodborne pathogens like HIV and hepatitis B/C are spread via contact with infected fluids.
D. A bite by an infected "tiny animal"
Vector-borne transmission includes diseases spread by animals like mosquitoes (e.g., malaria, dengue) or ticks (e.g., Lyme disease).
E. Transmission of a defective gene from parent to child
This describes a genetic disorder, not an infectious disease.
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