e: ID: A 95. The major class of antibody present in the mucous membranes of a. I
ID: 3505984 • Letter: E
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e: ID: A 95. The major class of antibody present in the mucous membranes of a. IgG b. IgE. c. IgA. d. IgD. the body is: 96. The predominant antibody of a secondary response is: a. IgE b. IgG. c. IgM. d. IgA 97. According to the clonal selection theory, antigens select lymphocyte clones a. the chemicals secreted by the lymphocytes. b. the proximity of the lymphocytes to the antigens. c. the shape of receptors on the lymphocyte's plasma membrane. d. producing toxins. by: Which of the following is true of lymphokines? a. They are produced by B cells b. They inhibit macrophage activity c. Lymphotoxin is an example of a lymphokine. d. They are produced by helper T cells. 98. 99. Which of the following can activate, or turn on, an inactive B cell? Binding to its specific antibody a. b. Binding to its specific antigen Helper T cell d. All B cells are activated when an infant is born c. 1o0. When a child develops measles and acquires immunity to a subsequent infection, this type of immunity is called immunity a. acquired b. natural c. active d. All of the above are correct 101 hich of th fologsnot chemical used as a chemical barrie to pathoens? Hydrochloric acid b. Sebum c. Complement d. Hydrolyzing enzymesExplanation / Answer
95) c) IgA
IgA is a type of antibody which plays an important role in the immune function of the mucous membranes. It is infact one of the most abundant isotype that is found in the body and also plays an important role in enhancing the immunity of the GI tract.
96) B) IgG
It is the most common type of antibody present in the body which represents nearly 75% of the serum antibodies. The antibodies are created and released with help of plasma B cells and is most commonly found in blood circulation
97) c) The shape of the receptors on the lymphocyte’s plasma membrane
The antigens are highly specific in nature and they have a special way to find the lymphocyte clones. There are specific receptors attached to the plasma membrane of the lymphocyte and this helps in the recognition.
Ans 98) c)Lymphotoxin is an example of lymphokine
It is a lymphokine cytokine which is produced by the Th1 type T-cells and helps with the vascular endothelial cells to bring a change in the surface adhesion molecules. This changes allow the binding of the phagocytic cells.
Ans 99) b) Binding to its specific antigen
The inactive B-cell can be activated as soon as it binds to the specific antigen. This leads to a complement formation and immune system is stimulated towards eliminating the antigen
Ans 100) d) All of the above are correct
As the child develops measles the child tends to acquire immunity which falls under acquired, natural and active immunity. Acquired immunity is the one that our body gains with time after its exposure to the infection. The body knows how to learn and destroy specific pathogens only after its exposure and this is a natural way of gaining an active and acquired immunity.
Ans 101) c) Complement
They are the part of the complement system which enhances the ability of the immune cells like antibodies and phagocytotic cells to clear the microbes and damaged cells.
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