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Question 307
Physiology → Haematology
Classification
Question
SSBAQuestion Header
Which pairing between lymphocyte population and immune function is correct?
Question Stem
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Options
A
T lymphocytes - humoral immunity through immunoglobulin production
B
B lymphocytes - cellular immunity
C
T lymphocytes - platelet-mediated haemostasis
D
B lymphocytes - humoral immunity through immunoglobulin production
E
B lymphocytes - differentiation into tissue macrophages
Explanation
T lymphocytes mediate cellular immunity, whereas B lymphocytes mediate humoral immunity through immunoglobulin production. Immunoglobulins are produced by ribosomes in lymphocytes.
Option Validity
A) This reverses the functions of the two lymphocyte populations. T lymphocytes mediate cellular immunity, whereas B lymphocytes are associated with humoral immunity and immunoglobulin production.
B) Cellular immunity is mediated by T lymphocytes rather than B lymphocytes. B lymphocytes are associated with humoral immunity.
C) Platelet-mediated haemostasis is a function of platelets, not T lymphocytes. T lymphocytes are associated with cellular immunity.
E) Tissue macrophages develop from circulating monocytes. B lymphocytes instead participate in humoral immunity.
Further Reading
Saxena. Textbook for MRCOG-1. Physiology - Haematology - Lymphocytes, p.70.