Question 1

A population of lymphocytes whose members are all alike and are capable of responding to the same specific antigen is called a(n)_______.

Accepted Answer

The answer of A population of lymphocytes whose members are...

Question 2

In HIV infection,reverse transcriptase

Accepted Answer

A)  makes DNA from viral RNA.
B)  makes RNA from viral DNA.
C)  makes protein from viral RNA.
D)  makes protein from viral DNA.

Question 3

An injection of synthetic antibodies imparts active immunity.

Accepted Answer

A) True 
 B)False

Question 4

Lymph is ______ ______ that has entered a lymphatic capillary.

Accepted Answer

The answer of Lymph is ______ ______ that has entered...

Question 5

Interleukin-1 secretion causes

Accepted Answer

A)  an allergic response.
B)  an antibody response.
C)  a fever.
D)  cytokine secretion.

Question 6

Fluid is kept from accumulating in tissue spaces by

Accepted Answer

A)  sweating.
B)  breathing.
C)  the urinary system.
D)  the lymphatic system.

Question 7

Cells in a lymph node that engulf and destroy damaged cells,foreign substances,and cellular debris are

Accepted Answer

A)  macrophages.
B)  lymphocytes.
C)  mast cells.
D)  cytokines.

Question 8

Drugs used to reduce the tissue rejection reaction following the transplantation of tissue from one person to another

Accepted Answer

A)  stimulate the formation of antibodies by the recipient's cells.
B)  reduce the recipient's immune response.
C)  reduce the differences between donor proteins and recipient proteins.
D)  reduce the chance of infection in the recipient.

Question 9

An immune response that is slower but more specific for the pathogen is the

Accepted Answer

A)  innate defense.
B)  adaptive defense.
C)  nonspecific defense.
D)  inborn defense.

Question 10

Lymph nodes are grouped throughout the body except in the

Accepted Answer

A)  lungs.
B)  central nervous system.
C)  mesentery.
D)  inguinal connective tissue.

Question 11

In active immunity,a person becomes immune to a pathogen as a result of having a disease.

Accepted Answer

A) True 
 B)False

Question 12

The formation of lymph increases as a result of

Accepted Answer

A)  increasing osmotic pressure in blood capillaries.
B)  increasing hydrostatic pressure in tissue fluid.
C)  decreasing volume of tissue fluid.
D)  decreasing protein concentration in tissue fluiD.

Question 13

Disease-causing agents such as viruses and bacteria are called ______.

Accepted Answer

The answer of Disease-causing agents such as viruses and bacteria...

Question 14

A vaccine produces its effects by

Accepted Answer

A)  directly attacking the antigens and neutralizing them.
B)  chemotaxis,the attraction of antigens to areas where the vaccine can destroy them.
C)  stimulating a primary immune response.
D)  activating autoantibodies.

Question 15

The thymus enlarges after puberty.

Accepted Answer

A) True 
 B)False

Question 16

An antigen is ______,whereas an antibody is ______.

Accepted Answer

A)  a foreign substance such as a protein or a polysaccharide to which lymphocytes respond;a globular protein that reacts with an antigen to eliminate the antigen
B)  an immunoglobulin that is produced by lymph nodes in response to bacteria;a foreign protein that enters the body and causes an immune reaction
C)  a hapten molecule that is complex in shape;an enzyme produced by the thymus gland that neutralizes antigens
D)  only on a pathogen;only in a human body

Question 17

Low-grade fever is an effective defense for short periods of time because it

Accepted Answer

A)  increases iron in the blood.
B)  includes pyrogens that destroy the pathogens.
C)  increases temperature,which slows the growth of bacteria.
D)  slows the attack of phagocytes.

Question 18

Factors that contribute to the prevalence of peanut allergy in the U.S.include the fact that

Accepted Answer

A)  peanut antigens are in infant formulA.
B)  peanuts lack allergens.
C)  peanut allergens are stopped and destroyed in the stomach,causing cramps.
D)  dry roasting activates the responsible allergens.

Question 19

Which of the following is not a mechanical barrier against microorganisms?

Accepted Answer

A)  Saliva
B)  Urine
C)  Tears
D)  Diarrhea

Question 20

A primary immune response ______,and a secondary immune response ______.

Accepted Answer

A)  is very important;is less important to the body's ability to protect itself
B)  produces antibodies within five to ten days of exposure to antigens;produces antibodies within a day or two of a subsequent exposure to the same antigen
C)  is very rapid in producing antibodies after exposure to antigens;is very slow in producing antibodies after exposure to antigens
D)  occurs only in children;occurs only in adults

Exam 16: Lymphatic System and Immunity

In active immunity,a person becomes immune to a pathogen as a result of having a disease.

Correct AnswerverifiedShow Answer

Lymph is ______ ______ that has entered a lymphatic capillary.

Correct AnswerverifiedShow Answer

Disease-causing agents such as viruses and bacteria are called ______.

Correct AnswerverifiedShow Answer

In HIV infection,reverse transcriptase

Correct AnswerverifiedShow Answer

An antigen is ______,whereas an antibody is ______.

Correct AnswerverifiedShow Answer

Which of the following is not a mechanical barrier against microorganisms?

Correct AnswerverifiedShow Answer

A population of lymphocytes whose members are all alike and are capable of responding to the same specific antigen is called a(n)_______.

Correct AnswerverifiedShow Answer

Cells in a lymph node that engulf and destroy damaged cells,foreign substances,and cellular debris are

Correct AnswerverifiedShow Answer

Low-grade fever is an effective defense for short periods of time because it

Correct AnswerverifiedShow Answer

The formation of lymph increases as a result of

Correct AnswerverifiedShow Answer

Fluid is kept from accumulating in tissue spaces by

Correct AnswerverifiedShow Answer

Interleukin-1 secretion causes

Correct AnswerverifiedShow Answer

A primary immune response ______,and a secondary immune response ______.

Correct AnswerverifiedShow Answer

The thymus enlarges after puberty.

Correct AnswerverifiedShow Answer

A vaccine produces its effects by

Correct AnswerverifiedShow Answer

Lymph nodes are grouped throughout the body except in the

Correct AnswerverifiedShow Answer

An injection of synthetic antibodies imparts active immunity.

Correct AnswerverifiedShow Answer

Factors that contribute to the prevalence of peanut allergy in the U.S.include the fact that

Correct AnswerverifiedShow Answer

An immune response that is slower but more specific for the pathogen is the

Correct AnswerverifiedShow Answer

Drugs used to reduce the tissue rejection reaction following the transplantation of tissue from one person to another

Correct AnswerverifiedShow Answer

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Lymph is that has entered a lymphatic capillary.

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An antigen is ,whereas an antibody is .

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A primary immune response ,and a secondary immune response .

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