ch 21 practice exam

Question 1

memory T cells can be up to ____ old

Answer 1

decades

Question 2

cytotoxic T cells are like natural killer cells because they both

Answer 2

secrete granzymes and perforin

Question 3

______ are found especially in the mucous membrane standing guard against parasites and allergens

Answer 3

eosinophils

Question 4

which of the following cannot act as antigen-presenting cells

Answer 4

antibodies

Question 5

which force does NOT help lymph to flow

Answer 5

the lymphatic node pump

Question 6

basophils of the blood help to get defensive leukocytes to the site quickly by releasing an anticoagulant called _____ and a vasodilator called ______

Answer 6

heparin
histamine

Question 7

before B cells secrete antibodies they differentiate into

Answer 7

plasma cells

Question 8

helper T cells do not

Answer 8

secrete fever-producing chemicals

Question 9

a pyrogen is a substance that causes

Answer 9

fever

Question 10

lymphatic vessels recover about _______ of the fluid filtered by capillaries

Answer 10

15%

Question 11

lymph is similar to blood plasma but very low in

Answer 11

protein

Question 12

the _____ tonsils are the largest and their surgical removal (tonsillectomy) used to be one of the most common surgical procedures performed in children

Answer 12

palatine

Question 13

_____ lacks the capacity to remember a pathogen to it in the future whereas ____ utilizes memory cells to adapt to a given pathogen and ward it off more easily in the future

Answer 13

innate immunity
adaptive immunity

Question 14

T cells achieve immunocompetence in the

Answer 14

thymus

Question 15

special lymphoid vessels called lactelas absorb dietary ______ that are not absorbed by the blood capillaries

Answer 15

lipids

Question 16

perforin is released by

Answer 16

cytotoxic T cells

Question 17

______ are the largest of the lymphatic vessels and they empty into the ______

Answer 17

collecting ducts
subclavian veins

Question 18

which is common in the distal small intestine

Answer 18

aggregated lymphoid nodules

Question 19

which of the following is NOT an ex of lymphoid tissue

Answer 19

macrophages

Question 20

vaccination stimulates _______ immunity

Answer 20

artificial active

Question 21

adaptive immunity involves macrophages, antibodies, and interleukin

Answer 21

true

Question 22

clonal selection of T cells happens in the thymus

Answer 22

false

Question 23

interferons are secreted in response to bacterial infections

Answer 23

true

Question 24

cellular immunity uses MHC-I and MHC-II but humoral immunity uses only MHC-II

Answer 24

true

Question 25

red bone marrow is where all immune cells of the lymphoid system originate

Answer 25

true

Question 26

a pathogen is a disease-causing microbe

Answer 26

true

Question 27

antibodies and complement can work together linking innate and adaptive immunity

Answer 27

true

Question 28

most memory B cells are found circulating in the lymph

Answer 28

false

Question 29

interleukins are chemical signals by which immune cells communicate with each other

Answer 29

true

Question 30

lymph originates in blood capillaries that pick up tissue fluid

Answer 30

false

Question 31

cytotoxic T cells degrade after coming in contact with an infected cell

Answer 31

false

Question 32

Pus is made of dead neutrophils, macrophages, and other tissues debris from a damaged tissue

Answer 32

true

Question 33

helper T cells respond only to epitopes attaches to MHC proteins

Answer 33

true

Question 34

the immune system spans nearly every organ and tissue in the human body

Answer 34

true

Question 35

an allergic reaction is a form of hyposensitivty

Answer 35

false

Question 36

the lymphoid system is involved in fluid recovery, immune surveillance, and lipid absorption

Answer 36

true

Question 37

humoral immunity takes care of intracellular viruses whereas cellular immunity takes care of extracellular viruses

Answer 37

false

Question 38

cytotoxic T cells respond only to antigens bound by MHC-I proteins

Answer 38

true

Question 39

cellular immunity uses B cells and humoral immunity uses antibodies

Answer 39

false

Question 40

the antigenicity of a molecule is due to specific regions of it called haptens

Answer 40

false

Question 41

removal of the _____ would be more harmful to a 1 year old child than an adult

Answer 41

thymus

Question 42

some antibodies against foreign antigens can react to similar self-antigen causing an autoimmune disease

Answer 42

true