Chapter 9: Muscles Test Bank Questions
And Answers
What bis bthe brole bof btropomyosin bin bskeletal bmuscles? b- bcorrect
banswers✔✔Tropomyosin bserves bas ba bcontraction binhibitor bby bblocking bthe bmyosin
bbinding bsites bon bthe bactin bmolecules
Approximately b80% bof ba bmuscle bfiber's bvolume bare bthe bmyofibrils. bThis
bcharacteristic breflects bmuscles bability bto b________. b- bcorrect banswers✔✔produce
bmovement bthrough bcontractile bforce
What bis bthe bmost bdistinguishing bcharacteristic bof bmuscle btissue? b- bcorrect
banswers✔✔the bability bto btransform bchemical benergy binto bmechanical benergy bto
bmove bthe bbody
Muscle btone bis b________. b- bcorrect banswers✔✔a bstate bof bsustained bpartial
bcontraction
Myoglobin b- bcorrect banswers✔✔stores boxygen bin bmuscle bcells
The boxygen-binding bprotein bfound bin bmuscle bcells bis b________. b- bcorrect
banswers✔✔myoglobin
What bis bthe bfunctional brole bof bthe bT btubules? b- bcorrect banswers✔✔enhance
bcellular bcommunication bduring bmuscle bcontraction
Muscle btissue bhas ball bof bthe bfollowing bproperties bexcept b________.
A.) bexcitability
B.) bsecretion
C.) bcontractibility
D.) bextensibility b- bcorrect banswers✔✔Secretion
An banaerobic bmetabolic bpathway bthat bresults bin bthe bproduction bof btwo bnet bATPs
bper bglucose bplus btwo bpyruvic bacid bmolecules bis b________. b- bcorrect
banswers✔✔Glycolysis
Addition bof bmore bmyoglobin bto ba bmuscle bfiber bwould bhave bthe blargest beffect bon
b________. b- bcorrect banswers✔✔fast boxidative band bslow boxidative bfibers
, The bcontractile bunits bof bskeletal bmuscles bare b________. b- bcorrect
banswers✔✔Myofibrils
What bdo byou bthink bthe bsymptoms bof bcurare bpoisoning bcould blook blike? b- bcorrect
banswers✔✔Curare bwill bonly baffect bmuscles bwith bACh breceptors bparalyzing bthem
If bgiven bthe bexact bsame bamount bof bATP, bwhich bof bthe bthree bfiber btypes bwould
bbe bable bto bcontract bfor bthe blongest bamount bof btime? b- bcorrect banswers✔✔slow
boxidative bfibers
Reduction bin bblood bflow bto ba bmuscle bfiber bwould bhave bthe bgreatest beffect bon
b________. b- bcorrect banswers✔✔Slow boxidative bfibers
The bsliding bfilament bmodel bof bcontraction binvolves b- bcorrect banswers✔✔actin band
bmyosin bsliding bpast beach bother band bpartially boverlapping
Which bwould bbe brecruited blater bin bmuscle bstimulation bwhen bcontractile bstrength
bincreases? b- bcorrect banswers✔✔Motor bunits bwith blarger, bless bexcitable bneurons
Although ball bthe banatomical bparts bof bmuscle bwork btogether bto bgive bit bits
bcharacteristics, bwhich bof bthe bfollowing bproteins blisted bbelow bwould bbe bmost
bassociated bwith bthe bcharacteristics bof bexcitability? b- bcorrect
banswers✔✔acetylcholine breceptors bin bthe bmotor bend bplate
A bmyosin bmolecule bin bthe bthick bfilaments bcan bbe bconsidered ba bprotein bhaving ba
bquaternary bstructural blevel. bWhich bbest bdescribes bthis bstructural blevel? b- bcorrect
banswers✔✔Myosin bmolecules bconsist bof btwo bheavy band btwo blight bpolypeptide
bchains
The bstrongest bmuscle bcontractions bare bnormally bachieved bby b________. b- bcorrect
banswers✔✔increasing bthe bstimulation bup bto bthe bmaximal bstimulus
Myasthenia bgravis bis ba bdisease bthat bis bbelieved bto bbe bcaused bby bautoimmune
bdisorder, bresulting bin bthe bloss bof bACh breceptors bat bthe bmotor bend bplate bof
bmuscle bfibers. bWhich bis blikely bto bbe ba bsymptom bof bmyasthenia bgravis? b- bcorrect
banswers✔✔Weakness bof bmuscle
Hypothetically, bif ba bmuscle bwere bstretched bto bthe bpoint bwhere bthick band bthin
bfilaments bno blonger boverlapped, b________. b- bcorrect banswers✔✔no bmuscle
btension bcould bbe bgenerated
The bmechanism bof bcontraction bin bsmooth bmuscle bis bdifferent bfrom bskeletal bmuscle
bin bthat b- bcorrect banswers✔✔the bsite bof bcalcium bregulation bdiffers
And Answers
What bis bthe brole bof btropomyosin bin bskeletal bmuscles? b- bcorrect
banswers✔✔Tropomyosin bserves bas ba bcontraction binhibitor bby bblocking bthe bmyosin
bbinding bsites bon bthe bactin bmolecules
Approximately b80% bof ba bmuscle bfiber's bvolume bare bthe bmyofibrils. bThis
bcharacteristic breflects bmuscles bability bto b________. b- bcorrect banswers✔✔produce
bmovement bthrough bcontractile bforce
What bis bthe bmost bdistinguishing bcharacteristic bof bmuscle btissue? b- bcorrect
banswers✔✔the bability bto btransform bchemical benergy binto bmechanical benergy bto
bmove bthe bbody
Muscle btone bis b________. b- bcorrect banswers✔✔a bstate bof bsustained bpartial
bcontraction
Myoglobin b- bcorrect banswers✔✔stores boxygen bin bmuscle bcells
The boxygen-binding bprotein bfound bin bmuscle bcells bis b________. b- bcorrect
banswers✔✔myoglobin
What bis bthe bfunctional brole bof bthe bT btubules? b- bcorrect banswers✔✔enhance
bcellular bcommunication bduring bmuscle bcontraction
Muscle btissue bhas ball bof bthe bfollowing bproperties bexcept b________.
A.) bexcitability
B.) bsecretion
C.) bcontractibility
D.) bextensibility b- bcorrect banswers✔✔Secretion
An banaerobic bmetabolic bpathway bthat bresults bin bthe bproduction bof btwo bnet bATPs
bper bglucose bplus btwo bpyruvic bacid bmolecules bis b________. b- bcorrect
banswers✔✔Glycolysis
Addition bof bmore bmyoglobin bto ba bmuscle bfiber bwould bhave bthe blargest beffect bon
b________. b- bcorrect banswers✔✔fast boxidative band bslow boxidative bfibers
, The bcontractile bunits bof bskeletal bmuscles bare b________. b- bcorrect
banswers✔✔Myofibrils
What bdo byou bthink bthe bsymptoms bof bcurare bpoisoning bcould blook blike? b- bcorrect
banswers✔✔Curare bwill bonly baffect bmuscles bwith bACh breceptors bparalyzing bthem
If bgiven bthe bexact bsame bamount bof bATP, bwhich bof bthe bthree bfiber btypes bwould
bbe bable bto bcontract bfor bthe blongest bamount bof btime? b- bcorrect banswers✔✔slow
boxidative bfibers
Reduction bin bblood bflow bto ba bmuscle bfiber bwould bhave bthe bgreatest beffect bon
b________. b- bcorrect banswers✔✔Slow boxidative bfibers
The bsliding bfilament bmodel bof bcontraction binvolves b- bcorrect banswers✔✔actin band
bmyosin bsliding bpast beach bother band bpartially boverlapping
Which bwould bbe brecruited blater bin bmuscle bstimulation bwhen bcontractile bstrength
bincreases? b- bcorrect banswers✔✔Motor bunits bwith blarger, bless bexcitable bneurons
Although ball bthe banatomical bparts bof bmuscle bwork btogether bto bgive bit bits
bcharacteristics, bwhich bof bthe bfollowing bproteins blisted bbelow bwould bbe bmost
bassociated bwith bthe bcharacteristics bof bexcitability? b- bcorrect
banswers✔✔acetylcholine breceptors bin bthe bmotor bend bplate
A bmyosin bmolecule bin bthe bthick bfilaments bcan bbe bconsidered ba bprotein bhaving ba
bquaternary bstructural blevel. bWhich bbest bdescribes bthis bstructural blevel? b- bcorrect
banswers✔✔Myosin bmolecules bconsist bof btwo bheavy band btwo blight bpolypeptide
bchains
The bstrongest bmuscle bcontractions bare bnormally bachieved bby b________. b- bcorrect
banswers✔✔increasing bthe bstimulation bup bto bthe bmaximal bstimulus
Myasthenia bgravis bis ba bdisease bthat bis bbelieved bto bbe bcaused bby bautoimmune
bdisorder, bresulting bin bthe bloss bof bACh breceptors bat bthe bmotor bend bplate bof
bmuscle bfibers. bWhich bis blikely bto bbe ba bsymptom bof bmyasthenia bgravis? b- bcorrect
banswers✔✔Weakness bof bmuscle
Hypothetically, bif ba bmuscle bwere bstretched bto bthe bpoint bwhere bthick band bthin
bfilaments bno blonger boverlapped, b________. b- bcorrect banswers✔✔no bmuscle
btension bcould bbe bgenerated
The bmechanism bof bcontraction bin bsmooth bmuscle bis bdifferent bfrom bskeletal bmuscle
bin bthat b- bcorrect banswers✔✔the bsite bof bcalcium bregulation bdiffers
