Immune System Quiz

Newborn infants gain most of their immunity from

antibodies passed from the mother across the placenta

Each of the following is a physical barrier to infection, except A)secretions B)body hair C)epithelium D)complement E)basement membranes

D

Immunoglobulins that are primarily found in glandular secretions are

IgA

Immunoglobulins that are found on the surface of B cells and may play a role in regulation of the humoral immune response are

IgD

Immunoglobulins that attach to mast cells and basophils and are involved in allergic reactions are

IgE

Immunoglobulins that are single molecules and are mainly responsible for resistance against viruses, bacteria, and bacterial toxins are

IgG

Immunoglobulins that are composed of five single molecules joined together, and are the first antibodies to be produced in response to infection are

IgM

Immunity that is genetically determined and present at birth is called ________ immunity.

innate

T is to ________ as B is to ________.

thymus-dependent; bone marrow-derived

The following are steps in the cell-mediated immune response 1. Several cycles of mitosis occur 2. Antigen is engulfed and presented by a macrophage 3. Cytotoxic T cells migrate to focus on infection 4. Undifferentiated T cells with specific receptors recognize the antigen 5. T cells differentiate into cytotoxic T cells and T memory cells 6. Cytotoxic T cells release perforin and/or lymphotoxin The correct sequence for these steps is

2,4,1,5,3,6

Histamine increases blood flow and vascular permeability. This would account for all of the following changes that occur during inflammation, except A) redness of the inflamed tissue. B) increased number of phagocytes being attracted to the tissue C) heat of the inflamed tissue. D) movement of defense proteins and cells into the interstitial space. E) swelling of the inflamed tissue.

B

The cells responsible for humoral immunity are the _____ cells

B

The body's nonspecific defenses include all of the following, except A)the skin B)inflammation C)antibodies D)interferon E)complement

C

Immunity that results from the natural exposure to an antigen in the environment is called _____ immunity.

active

Stem cells that will form B cells and NK cells are found in the

bone marrow

Fever can be described as the maintenance of the body temperature greater than

both 37.2C and 99F

B cells are primarily activated by the activities of

helper T cells

An inflammatory response is triggered when

mast cells release histamine, serotonin, and heparin

The first line of cellular defense against pathogens are the

phagocytes

The cells responsible for the production of circulating antibodies are ______ cells

plasma

The release of interleukin-1 by active macrophages would

produce a fever

Defense of the body against a particular bacteria or virus is provided by

specific immunity

In active immunization,

the body is deliberately exposed to an antigen

Stem cells that will form T cells are modified in the

thymus