1. Concept:Humoral immunity involves the synthesis and secretion of specific immunoglobulins (antibodies) to neutralize pathogens and toxins in body fluids.
2. High-Yield PYQ Note:This core concept was tested in both
PMC-2020 and
SZABMU-2024 (Reconduct).
3. Solution:- B lymphocytes: Upon antigen presentation and activation (facilitated by Helper T-cells), B-lymphocytes differentiate into plasma cells that produce and secrete large volumes of antigen-specific antibodies.
4. Why other options are incorrect:- T lymphocytes: Mediate cell-mediated immunity and provide cytokines; they do not synthesize or secrete soluble antibodies.
- Red blood cells (Erythrocytes): Specialized for oxygen and carbon dioxide transport via hemoglobin.
- Platelets (Thrombocytes): Non-nucleated fragments specialized in blood coagulation.
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Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.