Question

2. Which of the following cells are leukocytes? a. NK cells b. neutrophils c. monocytes d. all of the above e. none of the above 3 Which of the following cells are lymphocytes? a. NK cells b. neutrophils c. monocytes d. all of the above e. none of the above 4. Why do complement proteins not damage healthy cells normally? a. Complement proteins must be produced by activated leukocytes. b. Complement proteins must be activated by enzymatic cleavage. c. Leukocytes have complement receptors that facilitate opsonization. d. All activation pathways of complement depend on antibodies e. Healthy cells cannot be damaged by activated complement protiens. 5. Which of the following statements are TRUE about immune cells? a. Antigen-loaded dendritic cells (DCs) enter the lymph node (LN) via the blood vess via the afferent lymphatics. b. Both antigen-loaded DCs and naïve T cells enter LN via blood vessels. c Antigen-loaded DCs enter LN via afferent lymphatics while naive T cells enter LN d. Both antigen-loaded DCs and naive T cells enter LN via the afferent lymphatics. e. The trafficking of antigen-loaded DCs and naïve T cells within LN is random. 6. Memory T cells are generated a. upon second exposure to antigen. b. upon first exposure to antigen. c. upon repeated exposure to antigen. d. in the thymus. e. in lymph nodes.

Answer 1

QUESTION 2

In this context, all of the white blood cells are leukocytes. NK cells, neutrophils and monocytes are example of leukocytes cells and they have an important role in our immune system defense. So, the correct answer is all of the above.

QUESTION 3

NK cells are the from the same family of T and B cells which are lymphocytes. In fact, these three cells have a common progenitor. So, the correct answer is NK cells

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