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BIO 220 TOPIC 5 GRADED QUIZ LATEST

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BIO 220 Topic 5 Graded Quiz Latest

BIO220

BIO 220 Topic 5 Graded Quiz Latest

Question 1

Transplanted tissues and organs that contain _________ _________ are rejected by the body.

a. self-antigens

b. foreign antigens

c. foreign antibodies

d. self-antibodies

e. plasma proteins

Question 2

B-cells

a. are a subset of T cells.

b. when activated become plasma cells and produce antibodies.

c. are responsible for forming all the body’s memory cells.

d. suppress the activity of T cells.

e. mature in the thymus.

Question 3

Which of the following is NOT a secondary lymphatic organ?

a. spleen

b. lymph node

c. lymphatic nodule

d. thymus gland

Question 4

Which of the following is ly matched?

a. IgA – found in saliva and tears

b. IgD – can cross the placenta

c. IgG – first to challenge the antigen

d. IgM- binds to mast cells and basophils to stimulate inflammation

e. IgE – transfusion reactions

Question 5

Which of the following is usually the first cell type to leave the blood and enter infected tissues?

a. eosinophil

b. lymphocyte

c. monocyte

d. natural killer cell

e. neutrophil

Question 6

In systemic inflammation, pyrogens

a. decrease phagocytosis.

b. decrease vasodilation.

c. increase neutrophil production.

d. stimulate fever production.

e. are chemotaxic factors.

Question 7

Lymphocyte activation can occur in several ways. However, in all cases

a. lymphocytes must recognize an antigen.

b. helper T cells are activated first and they then stimulate other cells.

c. antigen-presenting cells process the antigen and present it to the lymphocytes.

d. cytokines released by the antigen stimulate the lymphocyte response.

e. antigens must be able to recognize the lymphocytes.

Question 8

MHC class II molecules are found on

a. neutrophils, monocytes, and macrophages.

b. dendritic cells, B cells, and helper T cells.

c. monocytes, helper T cells, and neutrophils.

d. B cells, macrophages, and dendritic cells.

e. B cells, C cells and D cells.

Question 9

Which of the following substances DOES NOT cause increased capillary permeability, chemotaxis, and

vasodilation?

a. cytokines

b. protaglandins

c. leukotrienes

d. complement

e. histamine

Question 10

In 0.00 points out of 2.50 Which is the proper order of events in cell-mediated immunity?

(1) cloning of cytotoxic T cells and memory T cells

(2) antigen presented to T lymphocyte

(3) activation of T lymphocytes

(4) cytotoxic T cells attack target cells

a. 2, 3, 4, 1

b. 1, 4, 2, 3

c. 2, 3, 1, 4

d. 3, 2, 4, 1

e. 1, 2, 3, 4,

Question 11

____ are part of cell-mediated immunity while ____ are part of antibody-mediated immunity.

a. B cells, NK cells

b. Antibodies, antigens

c. T cells, B cells

d. Macrophages, antibodies

e. Neutrophils, monocytes

Question 12

Once cytotoxic T cells are produced, which of the following is (are) consistent with their ability to attack

intracellular viruses?

a. Most nucleated cells process antigens through the MHC class I mechanisms.

b. Viral antigens are processed by the MHC class I mechanism and are presented to the cell surface.

c. Cytotoxic T cells bind to MHC class I processed antigens.

d. Cytotoxic T cells bound to the MHC class I processed antigens release lymphokines.

e. All of these choices are .

Question 13

Which of the following is a subpopulation of T cells?

a. cytotoxic

b. antigenic

c. cytokinetic

d. basophilic

e. antitoxic

Question 14

In the cell-mediated immune response, T cells secrete ___, which activate additional components of the

immune system.

a. antibodies

b. complement

c. collagen

d. cytokines

e. histamine

Question 15

The diagram illustrates the stimulation and effects of T cells. What does “A” represent?

a. memory T cells

b. cytotoxic T cells

c. contact killing

d. lysis of target cell

e. release of cytokines

Question 16

Lymphocyte proliferation begins by increasing the number of

a. macrophages.

b. B cells.

c. T suppressor cells.

d. helper T cells.

e. cytotoxic T cells.

Question 17

Antibodies secreted in breast milk

a. are IgG antibodies.

b. are IgA antibodies.

c. provide natural active adaptive immunity.

d. include the cytokine interleukin 2.

e. promote inflammation.

Question 18

Which of the following would be classified as an innate physical barrier?

a. activation of complement

b. phagocytosis of invading organisms

c. washing action of tears and saliva

d. inflammation e. release of histamine

Question 19

The inflammatory response

a. prevents the spread of an infection.

b. stimulates erythrocytes to leave the blood.

c. delays healing of damaged tissues.

d. depresses immunity.

e. is harmful and should be immediately reversed.

Question 20

The effects of cell-mediated immunity are the result of activities of

a. B cells.

b. cytotoxic T cells.

c. macrophages.

d. dendritic cells.

e. helper T cells.

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