Solved by a verified expert:EXAM4Fall 2010 FORMA
1. Which formof theexam do you have?
A.
FormA
B.
FormB
2. TheHIVvirusthat causes AIDSspecificallyattacksand killshelper T
cells. Thisweakens
theimmunesystem
becausehelper Tcells:
A.
directlydestroycellsinfected
withHIV
B. roam
thebodylookingfor”invaders”
C. turn
on (activates) theantibody
mediated and thecell-mediated
defensesystemsin the
body.
D. produceantibodies
E. turn
off theimmuneresponse
3. ChoosetheINCORRECT
statement.
A.
Theantibody-mediated immuneresponse
isdirected atantigensthat are
outsideofcells, freein body
fluids.
B. Thecell-mediatedimmuneresponseplaysarolein
therejection
of organ transplants
C. Amacrophagepresents
theantigen to theappropriatehelperTcell.
D.
Antibodiesareeffective
against virusesthat
haveinserted their geneticmaterial
intothehost cell
chromosome.
E.
Suppressor
Tcellsshut down the
immuneresponseafter
the“invader”(antigen) hasbeen eliminatedfromthebody.
4.
Which
partof aviruscomesfromaprevious
host cell?The:
A.
geneticinformation
B.
theprotein coat
(capsid)
C.
theenvelope
D. noneof theabove
5.
Indicatethechoicethat containsonlyCORRECT
statements.
Statements:
1. Antibodiesarespecific
to oneparticularantigen.
2.
Antibodiesareheld
within thecell thatproducesthem.
3.
Antibodiesmayinactivate(neutralize)
atoxin produced byabacterium.
4.
Antibodiesareproduced
bymacrophages.
5. Antibodiescan onlybeeffectiveagainst
antigensthatarefreeinthebloodstream(notwithin cells).
Choices:
A.
1, 2, 3
B.
2, 3, 4
C. 3, 4,5
D. 1, 3, 5
E. 1, 3, 4
6.
Theimmunesystem helpsprotect usagainst
cancer because attack
and killcancerouscellsthat develop.
A.
helper Tcells
B. Bcells
C. cytotoxic
Tcells
D. all
of theabove
7.
Howdovirusesgain entryto ahost cell?
A.
bybinding
to areceptor siteon
thehostcell
B.
bybinding
to an antibodysiteon
thehostcells
C.
bydissolvingapieceof thehost
cellmembrane
D.
allof
the
above
8. ChoosetheINCORRECT STATEMENTabout cervical cancer:
A. Thehuman papillomavirus(HPV)
isthought to bean important
causeofcervical
cancer
B. Awoman’srisk
of gettingcervical cancer generally
increaseswith the
number of
(male) sexual partnersshehashad.
C.
Awoman’srisk
of gettingcervical cancer islowered
if sheand her partner(s)consistentlyuseabarrier
meansof contraception, such as
acondom or diaphragm.
D. It can increaseawoman’s
risk of having
an ectopicpregnancy.
E. It can be
detected withaPap
test.
9. Your brother confidesinyou
that hehaspainful,
fluid-filled blister-likesoresonhispenis.Which
of thefollowingismost
likelyto bethecause?
A. syphilis
B. gonorrhea
C. chlamydia
D. genital warts
E. genital herpes
10. Jennifer
isa
28 year-old woman whoishaving
difficultygetting
pregnant. Aftermanytestsit isdetermined that thereason for thisproblem
isthat
she
hasscartissueblockingher oviducts(fallopian
tubes). TheSTDthat is
most
likelyto havecaused this
is.
A. syphilis
B. gonorrhea
C. chlamydia
D. genital herpes
E. genital warts
11.Which of thefollowing
directlyactivatesboth the
cell-mediated immuneresponseand the
antibody-mediated immuneresponse?
A.
memoryBcells
B. helper
Tcells
C. plasmacells
D. cytotoxic
Tcells
E. suppressor Tcells
12.
An antigen isa:
A. cell
that producesantibodies
B. receptor
on thesurfaceof alymphocytethat recognizesinvaders
C.
memorycell
thatcausesaquick responseto an invader
when it isencounteredasecond time
D. alargemoleculeonthesurfaceof an invader
that triggersan immuneresponse
E. noneof the
above
13. Your friend Joehasbeen dating
Claudiaand theyhavebeen
sexuallyactivefor threemonths.Joehad
never been sexuallyactivebeforehemet
Claudia. Joeconfides
in you that hehasnoticed
awartformingon his
penis. Hehasasked Claudiawhether shehasgenital warts.
She
said, “No.I’vedefinitelynever seen anythingremotelyresemblingawarton
mybody.”Heasksyouwheretheycould havecomefrom.
You correctlyrespond.
A.
You
probablygot wartsfromusingthedirtyurinal in themen’sroomof thegasstationwhereyou
work.
B. Theorganism
that causeswartsisso common
that you could havegotten
it anywhere.
C. Claudiaisobviously
lying. Shewouldhaveseen
awart.
D.
Inwomen
wartsoften formwithin
the
vaginaor on thecervix, and so Claudiamaynotrealizethat
she
hasgenital warts.
E. noneof the
above
14.
Howdoesthevirusmakenewgeneticinformation
and proteins?
A.
It
combineswith thehostcell DNA.
B.
It never doesreproduce; it onlygrowslarger.
C.
It usesthehost
cellstructures.
D.
Onceinsidethehost
cell it isableto
reproducesexually.
15. Your immunesystem doesnot usuallyattack
cellsbelonginginyour body
because:
A. suppressor Tcellsprevent theattack
B. theantigensonyour body
cellsblock theattack
C. antibodies paralyzehelper Tcells
D. memorycellsidentifyand protect bodycells
E.
your own body
cellshavemolecules
ontheir surfaces
that identifythem asbelongingin thebody
16. In which
choiceareall the
STDsusuallycurablewith
anantibiotic?
A.
herpes, chlamydia,
gonorrhea
B.
chlamydia,
syphilis,genital warts
C.
chlamydia,
herpes, syphilis
D.
genital
warts, gonorrhea, syphilis
E.
chlamydia,
gonorrhea, syphilis
17. Belowyou will
find aseriesof steps in thetriggeringof theimmuneresponse.
Indicatethechoicethat placesthestepsin theCORRECT order.
Steps:
a. avirgin
(cytotoxic) Tcell isactivated
b.
amacrophageencountersan “invader”(somethingthat is
not recognized asbelongingin thebody)
c. ahelper
Tcell
isactivated
d. asuppressor
Tcell becomes active
e. acytotoxicTcell destroys
theinvadingcell
Choices:
A. a,
b, c, d, e
B. b,
c, a, e, d
C. d, b,a,
c,e
D. b,
a, c, d, e
E. c,
a, c,e, d
18. ChoosetheINCORRECTstatement:
A. If thebacteriathat
causechlamydiaaretransferred totheeyes, it can causeblindness.
B. Gonorrhea, chlamydia, and syphiliscan becured
withantibiotics.
C. Most women
with chlamydiahaveno
symptoms.
D.
Aman with gonorrheamust
ejaculatein order to spread theinfectiousorganism to apartner.
E. HPV, which
causesgenital warts, can spread over theentire
anal genital area.
19. Which of thefollowingSTDsisINCORRECTLYpaired with ameansof diagnosisthat can
beused at somepoint in
theprogressionof
the
disease?
A. syphilis –blood test
B. gonorrhea
–blood test
C. chlamydia
–urinetest
D. chlamydia
— smear of cellsfrominfected area
E. herpes–blood test
20. Your cousin
Masoud needsakidneytransplant. Thedoctorsexplain
that if thetissuetypeof
thedonor kidneydoesn’tmatch Masoud’stissuetype,
that the
of
the
immunesystem would attackand kill thedonor
kidney, causingtheorgan to berejected.
A. Bcells
B. plasmacells
C. antibodies
D. effectorcytotoxicTcells
E. helperTcells
21. Therefore, to reducethepossibilityoforgan rejection, thedoctorstestall of Masoud’scloserelativesto seewhether
theywould besuitable
donors. Thedoctorsarelooking
for arelative:
A. whosetissueshavesimilar “self”markers(MHC
markers) to thoseon Masoud’scells.
B. who lacksantibodiesto Masoud’s
tissues
C. who has
suppressor Tcellsthat
will suppresstheimmuneresponseagainst
the
donor
kidney
D. lacksmacrophages
E. all
oftheabove
22. ChoosetheINCORRECTstatement:
A. Genital wartscan takemonthsto appear.
B.
Thesamevirusthat
causescold sorescan betransmitted tothegenital areaof anotherperson
through oral sex.
C. Herpescan
only
bespread when therearesymptoms..
23. Damagetonervetissuesuch
astheopticnerveand brain
occur duringwhich stageofsyphilis?
A.
first
B.
second
C.
third
D.
it never
occursin syphilis
24. ChoosetheINCORRECTstatement.
A.
Avirusinfectsonlyaparticulartypeofhost cell.Thisspecificityoccursbecausethevirusgenetic
materialmust
becompatiblewith
thehost
cell geneticmaterial for theviral genetic
materialto beinserted
into thehost
cell chromosome.
B. Viruses
can beshed without causingdiseasesymptoms.
C.
Manyvirusescan
enter alatent stageduringwhich
they
don’tcausediseasesymptoms.
Duringthelatent stagetheviral
geneticmaterial hasbeeninsertedinto thehost
cellchromosome.
D. Someviruses
causecancer.
25. ChoosetheINCORRECT
statement:
A. Chlamydia
can leadto sterility
in eithersex.
B.
HPVcan
causepelvicinflammatorydisease.
C. Cold
soresarecaused byaherpesvirus.
D.
Thebacterium that causes syphiliscan
crosstheplacenta
and infectafetusgrowingintheuterusifthemother hassyphilis
26.
Which
statementabout genital wartsisINCORRECT?
A.
Thewartsgrowfaster
in awoman whoisusingacontraceptivecontainingprogesterone.
B. You are
not contagiousuntil the
wartsappear
C. Thewartsmaytakeweeksto monthstoappear
D. Thewartsareextremelycontagious
E. Thewartsarecaused by
avirus
27.What is
thepurposeof theantigen thatisdisplayed on thesurfaceof amacrophage?
A. It indicatesthat
the“invader”hasbeen
capturedand theimmuneresponse
can beshut
down.sick).
B. It secretesantibodies.
C. It fitsin areceptor on the“invader”
and neutralizesit (prevents
it from makingyou
D. It identifiesthetarget that
the
immuneresponseshould
bedirectedagainst.
E. It causes
thetarget to burst.
28. When bacteriainfectan animal,thenumber of bacteriainthebodyincreases
gradually.Agraph of thegrowth of abacterial population isasmoothlyincreasingcurveasshown
in graph 1.Aviral infection showsadifferent
pattern. For awhilethereisno
evidenceof infection, and
thenthereisasuddenincreaseinthenumber
of viruses.
Thenumber staysconstant for atime; thenthereisanother
suddenincrease. Thecurveof viral
population growth lookslikeaseriesofsteps,
asshown
in graph b.Which of thefollowing
correctlyexplainsthedifferencein thepatternsof growth
of bacteriaand viruses?
A.
Virusesneed to rest
between division cycles, but
bacteriado not need rest.
B.
Bacteriadividecontinuouslywith
eachcell producingtwo
newcells.
Virusesreplicatewithin
acelland hundredsor thousands can bereleased
at once.
C.
Thefood
supplyto fuel division for
bacteriais alwaysavailable. Thefood supplyforviruses
isonlyavailable
duringlimited times,
andthesearethetimeswhen
virusesreplicate.
D. Noneof
theabove.
29. Whenyou moveinto the
dorms, you learn
that thereisagirlon
the
floor who hasaherpes
infection in herthroat.
Otherson thefloorareafraid
that theymight catch herpesfrom usingthetoilet
seatif shehasused
it beforethem. You correctlyexplain:
A.
You might, but it would beoral herpes(afever
blister),likeshehas,
and 80% ofAmericanshavethat.
B. You might. You better watchto seeif
she
wasin therebeforeyou.
C.
Even
ifyou
doget
it,you’ll
haveobvioussymptoms,
and it iseasilycured with
anantibiotic.
D.
Theonlywaythat could happenisif shelicked thetoilet seat when
she
wassheddingviruses,
placing viruseson thetoilet seat.Of
course,you wouldalso
haveto sit on theseatimmediatelyafterward
30.Thereason that
you usuallyonlyget
chickenpox onceisthat:
A. Antibodiesremain forever and immediatelyneutralizethechickenpox virusifyouareever exposed toit again.
B. Suppressor Tcellsformthat immediatelysuppresstheinfection if you areeverexposed
to thevirusagain
C.
Chickenpox antigensareonlyeffectiveonce.
D.
Macrophagescan no longer
recognizethechickenpox virusasan invader.
E. MemoryBcellsand memoryTcellsformed
thatmount animmuneresponse
veryquicklyifyou
areever
exposed to thevirusagain.
ISINCERELYHOPETHATSOMETHING
YOULEARNEDINTHISCLASSWILLHELPYOUTOLEADAHAPPIER,
HEALTHIERLIFE.
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