Which of the following features is correct about A?
(A) Endocrine gland.
(B) Lymphoid organ.
(C) It is a part of M.A.L.T.
(D) Maturation of T. lymphocyte and B lymphocytes.
Important Questions on Immune System
Read the following statements
I) lymphocytes are involved only in cell mediated immunity.
II) Thymus gland of mammals is a secondary lymphoid organ.
III) The part of antibody that recognises and binds to an antigen is called epitope.
IV) Interleukins are primarily involved in differentiation of the cells of immune system.
Among the above, the incorrect statements are
Study the following:
Statement : cells are involved in humoral and cell mediated immunity.
Statement : Natural killer cells are a type of lymphocytes.
The correct option among the following is
Statement II: The thymus gland of mammals is a secondary lymphoid organ.
Read the following statements and identify if they are true (T) or false (F):
(i) Booster response is also called 'anamnestic response'.
(ii) Allergy is due to release of chemicals like histamine and serotonin from mast cells.
(iii) Modern day lifestyle has resulted in lowering of immunity and more sensitivity to allergens.
(iv) Primary lymphoid organs provide the sites for interaction of lymphocytes with the antigen, which then proliferate to become effector cells.
(v) Passive immunity is slow and takes time to give its full effective response.
| (i) | (ii) | (iii) | (iv) | (v) | |
| (1) | T | T | T | F | F |
| (2) | T | T | F | T | F |
| (3) | F | F | T | F | F |
| (4) | F | T | F | T | F |
Read the following statement:
(i) The spleen is a large reservoir of RBCs.
(ii) Lymph nodes serve to trap the microorganisms which happen to get into the lymph and tissue fluid.
(iii) Mucosa Associated Lymphoid Tissue (MALT) constitutes 50% of the lymphoid tissue in the human body.
(iv) Thymus acts as a filter of blood by trapping blood-borne microorganisms.
(v) Only thymus provides a microenvironment for development and maturation of T lymphocytes.
Which of the above statements are correct?
Assertion: Lymph in lymphatic system is known as tissue fluid.
Reason: It consists of plasma proteins, RBCs and WBCs.
Identify the incorrect statements from the ones given below:
(i) Peyer’s patches are also called 'abdominal tonsils'.
(ii) Immunoglobulins are chemically lipoproteins.
(iii) Spleen is a large bean-shaped organ which mainly contains lymphocytes and phagocytes.
(iv) All lymphocytes are phagocytic and engulf pathogens.
