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BIO 202 > Exam 2 > Flashcards

Exam 2 Flashcards

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1
Q

special lymphatic vessels called lacteals absorb dietary ___ that are not absorbed by blood capillaries

A

lipids

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2
Q

lymphatic vessels recover about ___ of the fluid filtered by capillaries

A

15%

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3
Q

lymph is similar to blood plasma, but very low in ____

A

protein

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4
Q

which of the following forces does not help lymph flow?

A

the lymphatic node pump

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5
Q

___ are the largest of the lymphatic vessels, and they empty into the ___

A

collecting ducts;subclavain veins

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6
Q

___ are found in the mucous membrane,stnainf guard against parasites and allergens

A

eosinophils

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7
Q

___ employ respiratory burts to produce bacterial chemicals such as hydrogen peroxide and hypochlorite

A

neutrophils

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8
Q

immune surveillance is a process in which ___ nonspecifically detect and destroy foreign cells and diseased host cells

A

natural killer cells

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9
Q

perforin is released by

A

cytotoxic t cells

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10
Q

which of the following is not an example of lymphatic tissue

A

macrophages

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11
Q

which of the following is common in the distal small intestine

A

aggregated lymphoid nodule

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12
Q

t cells achieve immunocompetence in the ____

A

thymus

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13
Q

the ___ show a remarkable degree of degneration with age

A

thymus

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14
Q

which of the following does not belong to the second line of defense

A

gastric juices

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15
Q

__ lacks the capacity to remember a pathogen or react differently to it in the future, whereas __ utilizes memory cells to adapt to a given pathogen and ward it off more easily in the future

A

innate immunity; adaptive immunity

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16
Q

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

A

heparin;histamine

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17
Q

when an enemy cell is present, a ____ secretes perforins, which bore a hole in the enemy cell membrane

A

natural killer cell

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18
Q

___ are secreted by cells infected with viruses alterting neighboring cells and protecting them from becoming infected

A

interferons

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19
Q

__ are antimicrobial protiens

A

interferons

20
Q

complement fixation cannot lead to ___

A

endogenous pyrexia

21
Q

a pyrogen is a substance that causes ____

A

fever

22
Q

the first of a series of neutrophil behaviors in inflammation is ___

A

margination

23
Q

__ is not a cardinal sign characteristic of inflammation

A

impaired use

24
Q

which of these cellular agents does not participate in inflammation

A

cytotoxic t cells

25
Q

one characterisitic of the immune response is specificity. this means that ____

A

immunity is directed against a particular pathogen

26
Q

cellular immunity is effective against

A

cancer cells

27
Q

vaccination stimulates ___ immunity

A

artificial active immunity

28
Q

the serum used for emergency treatment of snakebites stimulates ____ immunity

A

artificial passive

29
Q

helper T cells recognize antigens when they are boudnd to an ____

A

major histocompatibility complex protien ( MHC)

30
Q

which of the following cannot act as antigen presenting cells?

A

T cells

31
Q

cytotoxic t ( tc) cells are like naruteal killer ( nk) cells because they both ____

A

secrete granzymes and perforin

32
Q

helper t cells do not ___

A

Secrete fever producing chemicals

33
Q

___ participate in both innate immunity and the immune response

A

Helper T cells

34
Q

which is the correct sequence of events in the humoral immune response?

A

antigen recognition, antigen presentation, clonal selection,differentiation, attack

35
Q

before b cells secrete antibodies, they differentiate into ___

A

plasma cells

36
Q

which of the following is something antibodies antibodies do not do

A

differentiate into memory antibodies, which re upon re exposure to the same pathogen would mount a quicker attack

37
Q

the humane immunodeficiency virus targets mainly ____

A

helper t cells

38
Q

one group of proteolytic enzymes secreted by natural killer cells is ____

A

granzymes

39
Q

the majority of t cells of the naive lymphocyte pool wait for the encounter with foreign antigens in the ____

A

lymphatic tissues

40
Q

autoimmune diseases are disorders in which the immune system fails to distinguish ___ from foreign ones

A

self antigens

41
Q

a person who has HIV positive and has a helper t cell count lower than ___ has aids

A

200 cells

42
Q

which of these organs shrinks significantly by adulthood

A

thymus

43
Q

which of these is the largest lymphoid organ in the body

A

spleen

44
Q

t/f pus is made of dead neutrophils macrophages, and other tissue debris from damaged tissue

A

true

45
Q

t/f do T cells make antibodies?

A

f

BIO 202 (8 decks)

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