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The Immune System

T and B LYMPH...

Question

T and B LYMPHOCYTES involved in cell and humoral mediated immune responses of the body are produced from a] thymus and bone marrow respectively b] bone marrow c] thymus only d] lymph nodes and bone marrow respectively

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Solution

Both lymphocytes are produced in bone marrow. T lymphocytes migrate to thymus for maturation while B lymphocytes remain in bone marrow for maturation. Ans b

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Q. Assertion :Lymphocytes arise from bone marrow and present in the blood, lymph and connective tissues. Reason: Lymphocytes migrate to thymus, where they develop into T cells and begin to mature.

Q. Assertion :Lymphocytes arise from bone marrow and present in the blood, lymph and serve as natural killer cells. Reason: Lymphocytes migrate to thymus, where they develop into T cells and begin to mature.

Q. Choose the correct statements regarding bone marrow and thymus.

Q. Both erythrocytes and leucocytes form in the
(a) bone marrow
(b) thymus
(c) tonsil
(d) lymphnode

Q. Assertion : Interaction of lymphocytes and antigens occur in the secondary lymphoid organs.
Reason : Thymus and bone marrow provides the microenvironment for the lymphocytes to interact with the antigen.

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