1. All of the following statements about immunoglobulins are FALSE except Questi

Question

1. All of the following statements about immunoglobulins are FALSE except

Question 1 options:

a. They are produced by both B- and T-lymphocytes

b. They can trigger localized mast cell degranulation when bound to antigen.

c. They phagocytize antigen-presenting cells.

d. They can trigger antigen clumping only by MHC II presenting pathogens.

e. They have evolved to recognize bacterial but not viral antigens.

3. A healthcare worker is exposed to the Zika virus while working in French Polynesia. What type of innate immune cell would normally destroy cells that have been infected with the virus?

Question 3 options:

a. T cells

b. B cells

c. Natural Killer cells

d. immunoglobulin-producing cells

e. two or more of the above

4. Which of the following is (are) true regarding antibody production?

Question 4 options:

a. Antibody production in response to the first exposure to an antigen is both slower and weaker than antibody production following subsequent exposures to the same antigen.

b. Effector and additional memory cells are produced as a result of B-memory cells being exposed to its targeted antigen.

c. Antibody release from T-lymphocytes occurs more rapidly than from B-lymphocytes

d. Both A and B.

e. Both A and C.

5. Major Histocompatibility Complex proteins

Question 5 options:

a. of Type I are recognized by Helper T-cells

b. part of the Complement System of proteins

c. of Type II are found on all nucleated cells

d. of Type I are perforins that cause apoptosis

e. of Type II are expressed by macrophages.

7. Consider a cell where Nernst equations predict EK = -75mV, and ENa = +55mV and the Goldman equation predicts Vrest=-60mV. If the membrane is potentially permeable only to these two ions, what can you conclude about the cell membrane?

Question 7 options:

a. Sodium must be in higher concentration inside than outside the cell.

b. The cell membrane must not be permeable to potassium.

c. The membrane must be more permeable to sodium than to potassium.

d. The membrane must be more permeable to potassium than to sodium.

e. The membrane must not be permeable to sodium.

10. B-lymphocytes are to antibodies as

Question 10 options:

a. complement proteins are to immunoglobulins

b. NK cells are to interferons

c. macrophages are to Helper T-cells

d. cytokines are to interferons

e. Regulatory T-cells are to Cytotoxic T-cells

a. They are produced by both B- and T-lymphocytes

b. They can trigger localized mast cell degranulation when bound to antigen.

c. They phagocytize antigen-presenting cells.

d. They can trigger antigen clumping only by MHC II presenting pathogens.

e. They have evolved to recognize bacterial but not viral antigens.

Explanation / Answer

Q1) B. Immunoglobulins can trigger localized mast cell degranulation when bound to antigen.

Q3. C) Natural Killer Cells respond to virus infections.

Q4. D) Both A and B

Q5. A) Major histocompatibility complex proteins of type 1 are recognized by T-Helper cells

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