PATHOLOGY MCQ
LYMPHO RETICULAR SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Foreign protein
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Microorganisms
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Nucleic Acids
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Lymphocytes
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Detailed explanation-1: -A third lineage of lymphoid cells, called natural killer cells, lack antigenspecific receptors and are part of the innate immune system. These cells circulate in the blood as large lymphocytes with distinctive cytotoxic granules (Fig. 1.6).
Detailed explanation-2: -Through receptor molecules on their surfaces, lymphocytes are able to bind antigens (foreign substances or microorganisms that the host recognizes as “nonself”) and help remove them from the body. Each lymphocyte bears receptors that bind to a specific antigen.
Detailed explanation-3: -There are three main types of lymphocytes: B cells, T cells, and natural killer cells. Two of these types of lymphocytes are critical for specific immune responses. They are B lymphocytes (B cells) and T lymphocytes (T cells).
Detailed explanation-4: -Lymphocyte subtypes CD3+, CD19+, CD16+CD56+, CD4+, CD8+, and CD3+HLA-DR+ in peripheral blood obtained from patients after thoracic organ transplantation.