HARD
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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.

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Important Questions on Immune System

MEDIUM

Read the following statements
I) TC 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

MEDIUM
Assume a population that has reached herd immunity for an infectious disease. If an infected individual is introduced to this population, which of the following is most likely to occur?
EASY
Which one of the following statements is incorrect with respect to human antibodies?
MEDIUM

Study the following:
Statement I : TH cells are involved in humoral and cell mediated immunity.
Statement II : Natural killer cells are a type of lymphocytes.

The correct option among the following is

MEDIUM
Give one significant difference between primary lymphoid organs and secondary lymphoid organs. Give one example of each.
MEDIUM
Statement I: Due to HIV, the number of TH cells progressively decreases in an infected person.
Statement II: The thymus gland of mammals is a secondary lymphoid organ.
EASY
Gamma immunoglobulins are synthesized inside:
MEDIUM
Lymph nodes are secondary lymphoid organs. Explain the role of lymph nodes in our immune response.
HARD
How does interstitial fluid or tissue fluid form?
EASY
Name the two main lymphatic organs in humans.
MEDIUM
Given below is the diagram of the human lymphatic system, where A, B, C, and D are lymphoid organs. Select incorrect options regarding the lymphoid organs labeled as A, B, C, and D.
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MEDIUM
The _____1_____ is the main lymphoid organ where all blood cells _____2____ lymphocytes are produced. The_____3_____ is a lobed organ located near the heart and beneath the breastbone. The_____3_____is quite large at the time of birth but keeps reducing in size with age and by the time puberty is attained it reduces to a very small size. Both _____1_____and _____3_____provide micro-environments for the development and maturation of T-lymphocytes.
MEDIUM

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

 

MEDIUM
Which of the following is incorrect regarding MALT?
MEDIUM
Which of the following glands is large-sized at birth but reduces in size with ageing?
MEDIUM

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?

MEDIUM

Assertion: Lymph in lymphatic system is known as tissue fluid.

Reason: It consists of plasma proteins, RBCs and WBCs.

EASY

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.