Home
Class 12
BIOLOGY
Assertion : MALT constitutes about fif...

Assertion : MALT constitutes about fifteen per cent of the lymphoid tissue in human body.
Reason : The bone marrow is the main lymphoid orgain where all bllod cells excluding lymphocytes are produced.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
D

MALT constitutes about 50 per cent of the lymphoid tissue in human body
the bone marrow is the main lymphoid organ where all blood cells including lymphocytes are prodcued
Promotional Banner

Similar Questions

Explore conceptually related problems

MALT constitutes about ... per cent of the lymphoid tissue in human body.

MALT constitutes about__________ percent of the lymphoid tissue in human body

Which of these statements is/are correct w.r.t. MALT? a. Constitutes about 2/3rd part of the lymphoid tissue in human body. Br b. Associated with the mucus lining of digestive, respiratory and urogenital tracts. Br c. Site for interaction of lymphocytes with the antigen. d. Cells like B and Lymphocytes migrate here after maturation. It ishfecondary lymphoid tissue

In the following question a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as : Assertion (A): Bone marrow and thymus are primary lymphoid organs. Reason(R): It is the organs, to which matured lymphocytes migrate, interact with antigens and then proliferate to become effector cells.

Assertion. Lymphocytes arise from the stem cells present in the bone marrow and occur in the blood, lymph and connective tissues. Reason. Lymphocytes migrate to bursal lymphoid tissue or to thymus and differentiate into B or T-cells.

[A]: Lymphocytes develop in lymphoid tissue and involved in cell mediated and humeral immunity. [R]: Lymphocytes are produced in primary lymphoid tissue (thymus, embryonic liver and adult bone narrow) and migrate to secondary lymphoid tissue (spleen and lymphnodes)

(a) Name the lymphoid organ in humans where all the blood cells are produced. (b) Where do the lymphocytes produced by the lymphoid organ mentioned above migrate and how do they affect immunity?