Deck 37: Immunity

Question 1

What is immunity?  

A) An organism's capacity to resist infection only
B) An organism's capacity to both resist and combat infection
C) A pathogen
D) An organism's capacity to combat infection only
E) A set of genetic instructions

Answer 1

B

Question 2

Degranulating leukocytes release ______,which cause(s)nearby arterioles to widen,increasing blood flow.  

A) cytokines
B) histamine
C) complement
D) neuromodulators
E) PAMP

Answer 2

C

Question 3

______________ degranulate in response to neuromodu-lators released at the site of tissue damage.  

A) Mast cells
B) Basophil
C) Macrophages
D) NK cells
E) T cells

Answer 3

A

Question 4

Normal microbiota help humans by the following ways,except  

A) preventing harmful bacteria from colonizing our epithelial tissues.
B) helping us digest food.
C) synthesizing essential nutrients.
D) influencing our immune function.
E) providing nutrients to the nervous system.

Question 5

Figure 37.9A


-The variable region of a light chain,produced by the alternative gene splicing of many versions of gene segments,____.  

A) A
B) B
C) C
D) D
E) E

Question 6

Chemical signaling molecules,such as interleukins and interferons,secreted by white blood cells are called ______.  

A) histamines
B) neutrophils
C) hormones
D) cytokines
E) complement

Question 7

The bacteria-killing ______ is found in most epithelial tissue secretions.  

A) amylase
B) gastric juices
C) lysozyme
D) lactate
E) DNAase

Question 8

A procedure that induces an antibody-mediated response against specific pathogens is called ______  

A) exposure
B) agglutination
C) NK cell activation
D) T cell activation
E) immunization

Question 9

Which bacteria help keep the vaginal pH below the range of tolerance of other bacteria and most fungi?  

A) Corynebacterium diphtheriae
B) Lactobacillus
C) Clostridium botulinum
D) Proteus
E) Moraxella

Question 10

Figure 37.9A


-The antigen-binding site is indicated by _______  

A) A
B) B
C) C
D) D
E) E

Question 11

Which cell plays a central role in all adaptive immune responses?  

A) Dendritic cell
B) Mast cell
C) Basophils
D) NK cell
E) T cell

Question 12

Innate immune mechanisms _____.  

A) are fast acting
B) take about a week to 10 days to come into full effect
C) are very specific for their targets
D) are tailored to only a few specific pathogens
E) are produced by genetic recombinations

Question 13

Upon activation by complement,_______________ engulf microorganisms and secrete cytokines to further alert the immune system to the invading pathogens.  

A) mast cells
B) basophil
C) macrophages
D) NK cells
E) T cells

Question 14

Most microorganisms that get swallowed are killed in the stomach by ___________ .  

A) lysozyme
B) protein-digesting enzymes
C) hydrochloric acid
D) lysozyme and acid
E) protein-digesting enzymes and acid

Question 15

Inflammation begins when _______________ release the contents of their granules into an affected tissue.  

A) eosinophils and neutrophils
B) dendritic cells and basophils
C) macrophages and neutrophils
D) basophils, neutrophils, and mast cells
E) B cells, leukocytes, and basophils

Question 16

Microorganisms that typically live on human sur¬faces,including the interior tubes and cavities of the digestive and respiratory tracts,are called ____________.  

A) normal flora
B) acne
C) biofilm
D) commensal organisms
E) parasitic organisms

Question 17

Phagocytes fol¬low a chemical trail of complement and cytokines to affected tissues in a process known as ______.  

A) phagocytosis
B) activation
C) inflammation
D) adaptive response
E) chemotaxis

Question 18

After responding to complement,the main function of dendritic cells is to present antigen to which cells in an adaptive immune response?  

A) Mast cells
B) Basophil
C) B cells
D) NK cells
E) T cells

Question 19

A condition in which microorgan¬isms secrete destructive enzymes and acids that cause inflammation of the surrounding gum is called ________.  

A) normal flora
B) shivering
C) hypervariable
D) periodontitis
E) dental plaque

Question 20

Which of the following are the most abundant leukocytes in blood,so they are often the first responders at a site of infection?  

A) Macrophage
B) Neutrophils
C) Basophil
D) Cytokines
E) Dendritic cell

Question 21

Which of the following are long-lived lymphocytes reserved for possible future encounters with the same threat?  

A) Neutrophils
B) Macrophages
C) Memory cells
D) Effector cells
E) Eosinophils

Question 22

Match each term with the most appropriate statement.
a.cells originating from antigen-presenting dendritic cells, activates other lymphocytes in an adaptive immune response
b.cells that directly destroy body cells already infected by viral or fungal parasites, as well as mutant and cancerous cells
c.lymphocytes that are held in reserve, circulate in the bloodstream, and enable a rapid response to subsequent encounters with the same invader
d.coats invading cells to facilitate its phagocytosis; also punctures their cell membrane
e.antibody-manufacturing cells that are produced and mature in the bone marrow
f.able to destroy cells but not dependent on recognition of antigen-MHC complexes
g.a class of proteins that help cells of the immune system communicate
h."big eaters" that alert other lymphocytes to the invasion of specific antigens
i.lymphocyte that has never bound to an antigen
j.a group of cells that are all produced asexually from one original parent cell
k.surface patterns of nonself molecules or particles
l.proteins released by cytotoxic T cells to destroy target cell membranes
m.preparation injected into the body to elicit a secondary immune response
n.the AIDs virus represses the expression of these
complement proteins

Question 23

_____is an autoimmune disease in which T cells initiate a cell-mediated response targeting the myelin in the brain and spinal cord.  

A) Epstein-Barr
B) Severe combined immune deficiency (SCID)
C) Multiple sclerosis (MS)
D) Muscular dystrophy
E) Huntington's disease

Question 24

A vigorous immune response to a normally harmless substance is called an___________.  

A) allergy
B) allergen
C) autoimmune response
D) inflammation
E) antibody-mediated immune response

Question 25

Which is the only antibody that can cross the pla¬centa to protect a fetus before its own immune system becomes active?  

A) IgA
B) IgE
C) IgM
D) I gG
E) IgD

Question 26

Figure 37.12


-The letter "B" from the accompanying figure represents ____.  

A) complement
B) MHC markers with antigen expressed to the surface of a cell
C) lysosome with MHC molecule
D) plasma membranes fusing
E) MHC recycling

Question 27

HIV virus particles that have evaded destruction by cytotoxic T cells persist in ________.  

A) dendritic cells
B) helper T cells
C) basophils
D) memory B cells
E) cytotoxic T cells

Question 28

In an antibody-mediated immune response,which cells produce antibodies that bind to the pathogen or toxin that triggered the response?  

A) Dendritic cell
B) Mast cells
C) B cells
D) NK cells
E) T cells

Question 29

Match each term with the most appropriate statement.
a.cells originating from antigen-presenting dendritic cells, activates other lymphocytes in an adaptive immune response
b.cells that directly destroy body cells already infected by viral or fungal parasites, as well as mutant and cancerous cells
c.lymphocytes that are held in reserve, circulate in the bloodstream, and enable a rapid response to subsequent encounters with the same invader
d.coats invading cells to facilitate its phagocytosis; also punctures their cell membrane
e.antibody-manufacturing cells that are produced and mature in the bone marrow
f.able to destroy cells but not dependent on recognition of antigen-MHC complexes
g.a class of proteins that help cells of the immune system communicate
h."big eaters" that alert other lymphocytes to the invasion of specific antigens
i.lymphocyte that has never bound to an antigen
j.a group of cells that are all produced asexually from one original parent cell
k.surface patterns of nonself molecules or particles
l.proteins released by cytotoxic T cells to destroy target cell membranes
m.preparation injected into the body to elicit a secondary immune response
n.the AIDs virus represses the expression of these
antigens

Question 30

An antibody consists of how many polypeptides?  

A) Four
B) Five
C) Two
D) Eight
E) Six

Question 31

The immune response that targets one's own body tissues is known as a(n)___________.  

A) acute illness
B) allergen
C) autoimmune response
D) cell-mediated immune response
E) antibody-mediated immune response

Question 32

Match each term with the most appropriate statement.
a.cells originating from antigen-presenting dendritic cells, activates other lymphocytes in an adaptive immune response
b.cells that directly destroy body cells already infected by viral or fungal parasites, as well as mutant and cancerous cells
c.lymphocytes that are held in reserve, circulate in the bloodstream, and enable a rapid response to subsequent encounters with the same invader
d.coats invading cells to facilitate its phagocytosis; also punctures their cell membrane
e.antibody-manufacturing cells that are produced and mature in the bone marrow
f.able to destroy cells but not dependent on recognition of antigen-MHC complexes
g.a class of proteins that help cells of the immune system communicate
h."big eaters" that alert other lymphocytes to the invasion of specific antigens
i.lymphocyte that has never bound to an antigen
j.a group of cells that are all produced asexually from one original parent cell
k.surface patterns of nonself molecules or particles
l.proteins released by cytotoxic T cells to destroy target cell membranes
m.preparation injected into the body to elicit a secondary immune response
n.the AIDs virus represses the expression of these
clone

Question 33

In adaptive immunity,which of the following cells act at once in a primary immune response?  

A) Neutrophils
B) Macrophages
C) Memory cells
D) Effector cells
E) Eosinophils

Question 34

A persistent pathogen can evade the host immune system by  

A) evolving changes in its envelope structure.
B) disrupting complement function.
C) producing toxins that inhibit phagocyte movement.
D) disrupting immune signaling.
E) slowing down its replication.

Question 35

Match each term with the most appropriate statement.
a.cells originating from antigen-presenting dendritic cells, activates other lymphocytes in an adaptive immune response
b.cells that directly destroy body cells already infected by viral or fungal parasites, as well as mutant and cancerous cells
c.lymphocytes that are held in reserve, circulate in the bloodstream, and enable a rapid response to subsequent encounters with the same invader
d.coats invading cells to facilitate its phagocytosis; also punctures their cell membrane
e.antibody-manufacturing cells that are produced and mature in the bone marrow
f.able to destroy cells but not dependent on recognition of antigen-MHC complexes
g.a class of proteins that help cells of the immune system communicate
h."big eaters" that alert other lymphocytes to the invasion of specific antigens
i.lymphocyte that has never bound to an antigen
j.a group of cells that are all produced asexually from one original parent cell
k.surface patterns of nonself molecules or particles
l.proteins released by cytotoxic T cells to destroy target cell membranes
m.preparation injected into the body to elicit a secondary immune response
n.the AIDs virus represses the expression of these
memory cells

Question 36

Match each term with the most appropriate statement.
a.cells originating from antigen-presenting dendritic cells, activates other lymphocytes in an adaptive immune response
b.cells that directly destroy body cells already infected by viral or fungal parasites, as well as mutant and cancerous cells
c.lymphocytes that are held in reserve, circulate in the bloodstream, and enable a rapid response to subsequent encounters with the same invader
d.coats invading cells to facilitate its phagocytosis; also punctures their cell membrane
e.antibody-manufacturing cells that are produced and mature in the bone marrow
f.able to destroy cells but not dependent on recognition of antigen-MHC complexes
g.a class of proteins that help cells of the immune system communicate
h."big eaters" that alert other lymphocytes to the invasion of specific antigens
i.lymphocyte that has never bound to an antigen
j.a group of cells that are all produced asexually from one original parent cell
k.surface patterns of nonself molecules or particles
l.proteins released by cytotoxic T cells to destroy target cell membranes
m.preparation injected into the body to elicit a secondary immune response
n.the AIDs virus represses the expression of these
B lymphocytes

Question 37

Match each term with the most appropriate statement.
a.cells originating from antigen-presenting dendritic cells, activates other lymphocytes in an adaptive immune response
b.cells that directly destroy body cells already infected by viral or fungal parasites, as well as mutant and cancerous cells
c.lymphocytes that are held in reserve, circulate in the bloodstream, and enable a rapid response to subsequent encounters with the same invader
d.coats invading cells to facilitate its phagocytosis; also punctures their cell membrane
e.antibody-manufacturing cells that are produced and mature in the bone marrow
f.able to destroy cells but not dependent on recognition of antigen-MHC complexes
g.a class of proteins that help cells of the immune system communicate
h."big eaters" that alert other lymphocytes to the invasion of specific antigens
i.lymphocyte that has never bound to an antigen
j.a group of cells that are all produced asexually from one original parent cell
k.surface patterns of nonself molecules or particles
l.proteins released by cytotoxic T cells to destroy target cell membranes
m.preparation injected into the body to elicit a secondary immune response
n.the AIDs virus represses the expression of these
interleukins

Question 38

Which is antibody is secreted as a dimer for stability and is found in mucus and other exo¬crine gland secretions?  

A) IgA
B) IgE
C) IgM
D) IgG
E) IgD

Question 39

All of the following are responses to allergen detection generated by mast cells EXCEPT  

A) inflamma¬tion in the airways.
B) increased mucus secre¬tion.
C) sneezing.
D) hives.
E) fever.

Question 40

Figure 37.12


-The letter "F" in the accompanying figure represents ____.  

A) complement
B) MHC markers with antigen expressed to the surface of a cell
C) lysosome fusing with a phagosome
D) plasma membranes fusing
E) MHC recycling

Question 41

Match each term with the most appropriate statement.
a.cells originating from antigen-presenting dendritic cells, activates other lymphocytes in an adaptive immune response
b.cells that directly destroy body cells already infected by viral or fungal parasites, as well as mutant and cancerous cells
c.lymphocytes that are held in reserve, circulate in the bloodstream, and enable a rapid response to subsequent encounters with the same invader
d.coats invading cells to facilitate its phagocytosis; also punctures their cell membrane
e.antibody-manufacturing cells that are produced and mature in the bone marrow
f.able to destroy cells but not dependent on recognition of antigen-MHC complexes
g.a class of proteins that help cells of the immune system communicate
h."big eaters" that alert other lymphocytes to the invasion of specific antigens
i.lymphocyte that has never bound to an antigen
j.a group of cells that are all produced asexually from one original parent cell
k.surface patterns of nonself molecules or particles
l.proteins released by cytotoxic T cells to destroy target cell membranes
m.preparation injected into the body to elicit a secondary immune response
n.the AIDs virus represses the expression of these
natural killer cells

Question 42

Match each term with the most appropriate statement.
a.cells originating from antigen-presenting dendritic cells, activates other lymphocytes in an adaptive immune response
b.cells that directly destroy body cells already infected by viral or fungal parasites, as well as mutant and cancerous cells
c.lymphocytes that are held in reserve, circulate in the bloodstream, and enable a rapid response to subsequent encounters with the same invader
d.coats invading cells to facilitate its phagocytosis; also punctures their cell membrane
e.antibody-manufacturing cells that are produced and mature in the bone marrow
f.able to destroy cells but not dependent on recognition of antigen-MHC complexes
g.a class of proteins that help cells of the immune system communicate
h."big eaters" that alert other lymphocytes to the invasion of specific antigens
i.lymphocyte that has never bound to an antigen
j.a group of cells that are all produced asexually from one original parent cell
k.surface patterns of nonself molecules or particles
l.proteins released by cytotoxic T cells to destroy target cell membranes
m.preparation injected into the body to elicit a secondary immune response
n.the AIDs virus represses the expression of these
macrophages

Question 43

Proteins produced by these bind to bacteria and viruses in the blood.

A)antigens
B)antibodies
C)helper T cells
D)cytotoxic T cells
E)effector B cells

Question 44

These directly attack the foreign cells of an incompatible skin graft.

A)antigens
B)antibodies
C)helper T cells
D)cytotoxic T cells
E)effector B cells

Question 45

Match each term with the most appropriate statement.
a.cells originating from antigen-presenting dendritic cells, activates other lymphocytes in an adaptive immune response
b.cells that directly destroy body cells already infected by viral or fungal parasites, as well as mutant and cancerous cells
c.lymphocytes that are held in reserve, circulate in the bloodstream, and enable a rapid response to subsequent encounters with the same invader
d.coats invading cells to facilitate its phagocytosis; also punctures their cell membrane
e.antibody-manufacturing cells that are produced and mature in the bone marrow
f.able to destroy cells but not dependent on recognition of antigen-MHC complexes
g.a class of proteins that help cells of the immune system communicate
h."big eaters" that alert other lymphocytes to the invasion of specific antigens
i.lymphocyte that has never bound to an antigen
j.a group of cells that are all produced asexually from one original parent cell
k.surface patterns of nonself molecules or particles
l.proteins released by cytotoxic T cells to destroy target cell membranes
m.preparation injected into the body to elicit a secondary immune response
n.the AIDs virus represses the expression of these
booster

Question 46

Classification. Respond to the following statements with reference to the five types of white cells listed below.
a.macrophages
b.helper T cells
c.B cells
d.cytotoxic T cells
e.natural killer cells
These cells destroy cells infected by viruses.

Question 47

Match each term with the most appropriate statement.
a.cells originating from antigen-presenting dendritic cells, activates other lymphocytes in an adaptive immune response
b.cells that directly destroy body cells already infected by viral or fungal parasites, as well as mutant and cancerous cells
c.lymphocytes that are held in reserve, circulate in the bloodstream, and enable a rapid response to subsequent encounters with the same invader
d.coats invading cells to facilitate its phagocytosis; also punctures their cell membrane
e.antibody-manufacturing cells that are produced and mature in the bone marrow
f.able to destroy cells but not dependent on recognition of antigen-MHC complexes
g.a class of proteins that help cells of the immune system communicate
h."big eaters" that alert other lymphocytes to the invasion of specific antigens
i.lymphocyte that has never bound to an antigen
j.a group of cells that are all produced asexually from one original parent cell
k.surface patterns of nonself molecules or particles
l.proteins released by cytotoxic T cells to destroy target cell membranes
m.preparation injected into the body to elicit a secondary immune response
n.the AIDs virus represses the expression of these
cytotoxic T lymphocytes

Question 48

Match each term with the most appropriate statement.
a.cells originating from antigen-presenting dendritic cells, activates other lymphocytes in an adaptive immune response
b.cells that directly destroy body cells already infected by viral or fungal parasites, as well as mutant and cancerous cells
c.lymphocytes that are held in reserve, circulate in the bloodstream, and enable a rapid response to subsequent encounters with the same invader
d.coats invading cells to facilitate its phagocytosis; also punctures their cell membrane
e.antibody-manufacturing cells that are produced and mature in the bone marrow
f.able to destroy cells but not dependent on recognition of antigen-MHC complexes
g.a class of proteins that help cells of the immune system communicate
h."big eaters" that alert other lymphocytes to the invasion of specific antigens
i.lymphocyte that has never bound to an antigen
j.a group of cells that are all produced asexually from one original parent cell
k.surface patterns of nonself molecules or particles
l.proteins released by cytotoxic T cells to destroy target cell membranes
m.preparation injected into the body to elicit a secondary immune response
n.the AIDs virus represses the expression of these
MHCs

Question 49

Classification. Respond to the following statements with reference to the five types of white cells listed below.
a.macrophages
b.helper T cells
c.B cells
d.cytotoxic T cells
e.natural killer cells
These cells kill tumor cells but are not B or T lymphocytes.

Question 50

These produce immunoglobulins in response to the reinvasion by a virus.

A)antigens
B)antibodies
C)helper T cells
D)cytotoxic T cells
E)effector B cells

Question 51

Match each term with the most appropriate statement.
a.cells originating from antigen-presenting dendritic cells, activates other lymphocytes in an adaptive immune response
b.cells that directly destroy body cells already infected by viral or fungal parasites, as well as mutant and cancerous cells
c.lymphocytes that are held in reserve, circulate in the bloodstream, and enable a rapid response to subsequent encounters with the same invader
d.coats invading cells to facilitate its phagocytosis; also punctures their cell membrane
e.antibody-manufacturing cells that are produced and mature in the bone marrow
f.able to destroy cells but not dependent on recognition of antigen-MHC complexes
g.a class of proteins that help cells of the immune system communicate
h."big eaters" that alert other lymphocytes to the invasion of specific antigens
i.lymphocyte that has never bound to an antigen
j.a group of cells that are all produced asexually from one original parent cell
k.surface patterns of nonself molecules or particles
l.proteins released by cytotoxic T cells to destroy target cell membranes
m.preparation injected into the body to elicit a secondary immune response
n.the AIDs virus represses the expression of these
perforin

Question 52

An Rh+ molecule in the body of an Rh woman is an example of these.

A)antigens
B)antibodies
C)helper T cells
D)cytotoxic T cells
E)effector B cells

Question 53

These bind,as in a lock-and-key mechanism,to foreign proteins.

A)antigens
B)antibodies
C)helper T cells
D)cytotoxic T cells
E)effector B cells

Question 54

An antigen-bearing pathogen that breaches normal flora surface barriers first triggers __________ immunity.

Question 55

__________ immunity specifically targets billions of different antigens.

Question 56

Match each term with the most appropriate statement.
a.cells originating from antigen-presenting dendritic cells, activates other lymphocytes in an adaptive immune response
b.cells that directly destroy body cells already infected by viral or fungal parasites, as well as mutant and cancerous cells
c.lymphocytes that are held in reserve, circulate in the bloodstream, and enable a rapid response to subsequent encounters with the same invader
d.coats invading cells to facilitate its phagocytosis; also punctures their cell membrane
e.antibody-manufacturing cells that are produced and mature in the bone marrow
f.able to destroy cells but not dependent on recognition of antigen-MHC complexes
g.a class of proteins that help cells of the immune system communicate
h."big eaters" that alert other lymphocytes to the invasion of specific antigens
i.lymphocyte that has never bound to an antigen
j.a group of cells that are all produced asexually from one original parent cell
k.surface patterns of nonself molecules or particles
l.proteins released by cytotoxic T cells to destroy target cell membranes
m.preparation injected into the body to elicit a secondary immune response
n.the AIDs virus represses the expression of these
helper T cell

Question 57

Classification. Respond to the following statements with reference to the five types of white cells listed below.
a.macrophages
b.helper T cells
c.B cells
d.cytotoxic T cells
e.natural killer cells
These cells recognize cell surface antigens and initiate the proliferation of lymphocytes.

Question 58

Classification. Respond to the following statements with reference to the five types of white cells listed below.
a.macrophages
b.helper T cells
c.B cells
d.cytotoxic T cells
e.natural killer cells
Antibody production occurs in these cells.

Question 59

Match each term with the most appropriate statement.
a.cells originating from antigen-presenting dendritic cells, activates other lymphocytes in an adaptive immune response
b.cells that directly destroy body cells already infected by viral or fungal parasites, as well as mutant and cancerous cells
c.lymphocytes that are held in reserve, circulate in the bloodstream, and enable a rapid response to subsequent encounters with the same invader
d.coats invading cells to facilitate its phagocytosis; also punctures their cell membrane
e.antibody-manufacturing cells that are produced and mature in the bone marrow
f.able to destroy cells but not dependent on recognition of antigen-MHC complexes
g.a class of proteins that help cells of the immune system communicate
h."big eaters" that alert other lymphocytes to the invasion of specific antigens
i.lymphocyte that has never bound to an antigen
j.a group of cells that are all produced asexually from one original parent cell
k.surface patterns of nonself molecules or particles
l.proteins released by cytotoxic T cells to destroy target cell membranes
m.preparation injected into the body to elicit a secondary immune response
n.the AIDs virus represses the expression of these
naive cells

Question 60

Classification. Respond to the following statements with reference to the five types of white cells listed below.
a.macrophages
b.helper T cells
c.B cells
d.cytotoxic T cells
e.natural killer cells
These cells scavenge dead cells and attack bacteria directly.

Question 61

__________ fights infection by increasing the metabolic rate.

Question 62

Inflammation begins when mast cells in tissue release __________,which increases blood flow and also makes capillaries leaky to phagocytes and plasma proteins.

Question 63

Ig stands for __________.

Question 64

Antigen receptors give __________ the collective potential to recognize billions of different antigens.

Question 65

In ABO blood typing,____occurs when the patient's blood sample is mixed with antibodies that recognize the H antigen on the red blood cells.

Question 66

Allergy medicines relieve symptoms by dampening the effects of_________.

Question 67

__________ are proteins,Y-shaped antigen receptors made only by __________ cells.

Question 68

Which of the following statements is NOT correct in context with the NK cells?  

A) NK cells cannot kill body cells that lack MHC markers.
B) NK cells rec¬ognize certain proteins displayed by body cells that are under stress.
C) NK cells can operate early in immune defenses
D) NK cells can kill infected or ailing body cells.
E) Cytokines secreted by helper T cells stimulate NK cell division

Question 69

Which of the following statements is NOT a defining characteristic of adaptive immunity?  

A) Self/nonself recognition
B) Tailored to specific antigens
C) Ability to produce diverse antigen receptors
D) Memory allows a fast and strong secondary response
E) Fast-acting initial response mediated by complement

Question 70

Which is an example of a disorder in which an individual becomes vulnerable to infection by opportunistic agents that are typically harmless to people in good health?  

A) Epstein-Barr
B) Severe combined immune deficiency (SCID)
C) Multiple sclerosis (MS)
D) Muscular dystrophy
E) Huntington's disease

Question 71

T cell receptors recognize ______,distinguishing cells that belong to the body from infected body cells.  

A) antigens
B) MHC markers
C) antigens and MHC markers
D) complement
E) cytokines and complement

Question 72

______________ refers to a procedure in which an individual exposed to a lethal agent receives antibodies purified from the blood of another for immediate benefit.

Question 73

Some clones of the original immune cells are __________ cells,long-lived B and T cells reserved for future encounters with the antigen.