ANATOMY AND PHYSIOLOGY EXAM 3 QUESTIONS WITH 100%
COMPLETE AND ACCURATE ANSWERS.
Sarcolemma---Correct-Answer-muscle-plasma-membrane
Sarcoplasm---Correct-Answer-cytoplasm-of-a-muscle-cell
Muscle-cells-respond-to-neural,-stretch,-or-other-signals-by-changing-their-_______.---
Correct-Answer-sarcolemma-electrical-potential-(voltage)
The-electrical-potential-change-is-coupled-to-intracellular-changes-that-result-in-______.---
Correct-Answer-force-generation-(contraction)
Contractility---Correct-Answer-active-shortening-of-muscle-cell-and-generation-of-tension-
(force)
Extensibility---Correct-Answer-passive-stretching-of-muscle-cells
Elasticity---Correct-Answer-return-of-muscle-cells-to-original-resting-length-after-being-
stretched
Which-muscle-tissue(s)-has-cells-w/-obvious-stripes-called-striations---Correct-Answer-
skeletal,-cardiac
Which-muscle-tissue-is-voluntary-and-which-is-involuntary?---Correct-Answer-voluntary-
skeletal......involuntary-cardiac,-smooth
What-muscle-tissue-contracts-rapidly-but-tires-easily?---Correct-Answer-skeletal
Cardiac-muscle-contracts-at-a-rate-set-by-the-heart's-________.---Correct-Answer-
pacemaker
,Which-muscle-tissue-is-primarily-found-in-the-walls-of-hollow-visceral-organs?---Correct-
Answer-smooth
Which-muscle-tissue-forces-food-and-other-substances-through-internal-body-cavities?---
Correct-Answer-smooth
What-are-the-three-connective-tissue-sheaths?---Correct-Answer-endomysium,-
perimysium,-epimysium
What-is-a-fine-sheath-of-connective-tissue-composed-of-reticular-fibers-surrounding-each-
muscle-fiber?---Correct-Answer-endomysium
What-is-fibrous-connective-tissue-that-surrounds-groups-of-muscle-fibers-called-fascicles?---
Correct-Answer-perimysium
What-is-an-overcoat-of-dense-regular-connective-tissue-that-surrounds-the-entire-muscle?---
Correct-Answer-epimysium
each-muscle-is-served-by-________.---Correct-Answer-one-nerve(bundle-of-nerve-fibers),-
an-artery,-and-one-or-more-veins
when-muscles-contract...---Correct-Answer-the-movable-bone-(insertion)-moves-toward-
the-immovable-bone-(origin)
How-does-a-muscle-attach-to-a-bone-directly?---Correct-Answer-epimysium-of-the-muscle-
is-fused-to-the-periosteum-of-a-bone-(less-common)
How-does-a-muscle-attach-to-a-bone-indirectly?---Correct-Answer-connective-tissue-
wrappings-extend-beyond-the-muscle-as-a-tendon-or-aponeurosis-that-attaches-to-a-bone-
(more-common)
What-is-a-single-muscle-cell-called?---Correct-Answer-a-myocyte-or-muscle-fiber
Myocyte-size---Correct-Answer-10-to-100-micrometers-in-diameter-and-many-10s-of-cm-
long
, Each-mature-myocyte-is-created-by-fusion-of-multiple-precursor-cells-called-_________.---
Correct-Answer-myoblasts
Sarcoplasm-has-numerous-________-and-an-oxygen-binding-protein-called-_________.---
Correct-Answer-glycosomes,-myoglobin
Myocytes-contain-the-usual-organelles,-as-well-as....---Correct-Answer-myofibrils,-
sarcoplasmic-reticulum,-T-tubules
Densely-packed-rodlike-contractile-elements-are-called-________.---Correct-Answer-
myofibrils
What-is-the-smallest-contractile-unit-of-a-muscle-called?---Correct-Answer-a-sarcomere
What-is-the-region-of-a-myofibril-b/w-two-successive-Z-discs?---Correct-Answer-a-
sarcomere
What-is-a-sarcomere-composed-of?---Correct-Answer-thick-and-thin-myofilaments-made-
up-of-contractile-proteins
How-long-does-a-thick-filament-of-a-myofilament-extend?-A-thin-filament?---Correct-
Answer-thick:-the-entire-length-of-an-A-band
thin:-across-the-I-band-and-part-way-into-the-A-band
What-is-a-coin-shaped-sheet-of-proteins-(connectins)-that-anchors-the-thin-filaments-and-
connects-myofibrils?---Correct-Answer-Z-disc
Where-do-elastic-filaments-stretch-and-what-are-they-made-of?---Correct-Answer-from-Z-
disc-through-the-thick-filament-to-the-M-line.
a-huge-protein-called-titin.
What-are-thick-filaments-composed-of?---Correct-Answer-200-500-myosin-protein-
molecules
What-protein-has-a-rod-like-tail-and-two-globular-heads?---Correct-Answer-myosin
COMPLETE AND ACCURATE ANSWERS.
Sarcolemma---Correct-Answer-muscle-plasma-membrane
Sarcoplasm---Correct-Answer-cytoplasm-of-a-muscle-cell
Muscle-cells-respond-to-neural,-stretch,-or-other-signals-by-changing-their-_______.---
Correct-Answer-sarcolemma-electrical-potential-(voltage)
The-electrical-potential-change-is-coupled-to-intracellular-changes-that-result-in-______.---
Correct-Answer-force-generation-(contraction)
Contractility---Correct-Answer-active-shortening-of-muscle-cell-and-generation-of-tension-
(force)
Extensibility---Correct-Answer-passive-stretching-of-muscle-cells
Elasticity---Correct-Answer-return-of-muscle-cells-to-original-resting-length-after-being-
stretched
Which-muscle-tissue(s)-has-cells-w/-obvious-stripes-called-striations---Correct-Answer-
skeletal,-cardiac
Which-muscle-tissue-is-voluntary-and-which-is-involuntary?---Correct-Answer-voluntary-
skeletal......involuntary-cardiac,-smooth
What-muscle-tissue-contracts-rapidly-but-tires-easily?---Correct-Answer-skeletal
Cardiac-muscle-contracts-at-a-rate-set-by-the-heart's-________.---Correct-Answer-
pacemaker
,Which-muscle-tissue-is-primarily-found-in-the-walls-of-hollow-visceral-organs?---Correct-
Answer-smooth
Which-muscle-tissue-forces-food-and-other-substances-through-internal-body-cavities?---
Correct-Answer-smooth
What-are-the-three-connective-tissue-sheaths?---Correct-Answer-endomysium,-
perimysium,-epimysium
What-is-a-fine-sheath-of-connective-tissue-composed-of-reticular-fibers-surrounding-each-
muscle-fiber?---Correct-Answer-endomysium
What-is-fibrous-connective-tissue-that-surrounds-groups-of-muscle-fibers-called-fascicles?---
Correct-Answer-perimysium
What-is-an-overcoat-of-dense-regular-connective-tissue-that-surrounds-the-entire-muscle?---
Correct-Answer-epimysium
each-muscle-is-served-by-________.---Correct-Answer-one-nerve(bundle-of-nerve-fibers),-
an-artery,-and-one-or-more-veins
when-muscles-contract...---Correct-Answer-the-movable-bone-(insertion)-moves-toward-
the-immovable-bone-(origin)
How-does-a-muscle-attach-to-a-bone-directly?---Correct-Answer-epimysium-of-the-muscle-
is-fused-to-the-periosteum-of-a-bone-(less-common)
How-does-a-muscle-attach-to-a-bone-indirectly?---Correct-Answer-connective-tissue-
wrappings-extend-beyond-the-muscle-as-a-tendon-or-aponeurosis-that-attaches-to-a-bone-
(more-common)
What-is-a-single-muscle-cell-called?---Correct-Answer-a-myocyte-or-muscle-fiber
Myocyte-size---Correct-Answer-10-to-100-micrometers-in-diameter-and-many-10s-of-cm-
long
, Each-mature-myocyte-is-created-by-fusion-of-multiple-precursor-cells-called-_________.---
Correct-Answer-myoblasts
Sarcoplasm-has-numerous-________-and-an-oxygen-binding-protein-called-_________.---
Correct-Answer-glycosomes,-myoglobin
Myocytes-contain-the-usual-organelles,-as-well-as....---Correct-Answer-myofibrils,-
sarcoplasmic-reticulum,-T-tubules
Densely-packed-rodlike-contractile-elements-are-called-________.---Correct-Answer-
myofibrils
What-is-the-smallest-contractile-unit-of-a-muscle-called?---Correct-Answer-a-sarcomere
What-is-the-region-of-a-myofibril-b/w-two-successive-Z-discs?---Correct-Answer-a-
sarcomere
What-is-a-sarcomere-composed-of?---Correct-Answer-thick-and-thin-myofilaments-made-
up-of-contractile-proteins
How-long-does-a-thick-filament-of-a-myofilament-extend?-A-thin-filament?---Correct-
Answer-thick:-the-entire-length-of-an-A-band
thin:-across-the-I-band-and-part-way-into-the-A-band
What-is-a-coin-shaped-sheet-of-proteins-(connectins)-that-anchors-the-thin-filaments-and-
connects-myofibrils?---Correct-Answer-Z-disc
Where-do-elastic-filaments-stretch-and-what-are-they-made-of?---Correct-Answer-from-Z-
disc-through-the-thick-filament-to-the-M-line.
a-huge-protein-called-titin.
What-are-thick-filaments-composed-of?---Correct-Answer-200-500-myosin-protein-
molecules
What-protein-has-a-rod-like-tail-and-two-globular-heads?---Correct-Answer-myosin
