CSCS Exam UPDATED ACTUAL Exam
Questions and CORRECT Answers
Muscle Anatomy - CORRECT ANSWER - muscle belly, fascicle, muscle fiber,
myofilaments
Muscle connective tissues - CORRECT ANSWER - Tendon, epimysium, perimysium,
endomysium
Motor Unit - CORRECT ANSWER - 1 alpha motor neuron and all the muscle fibers it
innervates
neuromuscular junction - CORRECT ANSWER - the junction between a motor neuron
and one muscle fiber
Sarcolemma - CORRECT ANSWER - muscle cell membrane
Ca++ - CORRECT ANSWER - main ion that controls muscle contraction
A-band - CORRECT ANSWER - dark area; extends length of the thick filaments
I-band - CORRECT ANSWER - thin filaments only
H-zone - CORRECT ANSWER - The region at the center of an A band of a sarcomere that
is made up of myosin only. The H zone gets shorter (and may disappear) during muscle
contraction.
Sarcomere - CORRECT ANSWER - contractile unit of a muscle fiber
, Actin - CORRECT ANSWER - thin filaments with troponin and tropomyosin
Myosin - CORRECT ANSWER - thick filament
All or None principle - CORRECT ANSWER - all fibers within a motor unit contract and
develop force at the same time
Muscle twitch - CORRECT ANSWER - the response of a muscle to a single brief
threshold stimulus
Muscle tetany - CORRECT ANSWER - The summation of many muscle fiber twitches.
Sliding filament: resting phase - CORRECT ANSWER - no tension in the muscle
Sliding filament: excitation-contraction phase - CORRECT ANSWER - SR releases
CA2+, binds to troponin, causing shift in tropomyosin; force production is directly related to # of
cross bridges formed
Sliding filament: contraction phase - CORRECT ANSWER - energy for cross bridge
formation comes from hydrolysis of ATP to ADP+Pi; another ATP must attach to myosin head
for it to detach from actin and recock; H-zone shrinks, I-zone shrinks
Sliding filament: recharge phase - CORRECT ANSWER - as long as Ca++ and ATP are
present contraction is repeated
Sliding filament: relaxation phase - CORRECT ANSWER - occurs when nerve stops
firing, Ca2+ pumped back into SR, preventing link between actin and myosin
Force production = - CORRECT ANSWER - # of formed cross bridges
Questions and CORRECT Answers
Muscle Anatomy - CORRECT ANSWER - muscle belly, fascicle, muscle fiber,
myofilaments
Muscle connective tissues - CORRECT ANSWER - Tendon, epimysium, perimysium,
endomysium
Motor Unit - CORRECT ANSWER - 1 alpha motor neuron and all the muscle fibers it
innervates
neuromuscular junction - CORRECT ANSWER - the junction between a motor neuron
and one muscle fiber
Sarcolemma - CORRECT ANSWER - muscle cell membrane
Ca++ - CORRECT ANSWER - main ion that controls muscle contraction
A-band - CORRECT ANSWER - dark area; extends length of the thick filaments
I-band - CORRECT ANSWER - thin filaments only
H-zone - CORRECT ANSWER - The region at the center of an A band of a sarcomere that
is made up of myosin only. The H zone gets shorter (and may disappear) during muscle
contraction.
Sarcomere - CORRECT ANSWER - contractile unit of a muscle fiber
, Actin - CORRECT ANSWER - thin filaments with troponin and tropomyosin
Myosin - CORRECT ANSWER - thick filament
All or None principle - CORRECT ANSWER - all fibers within a motor unit contract and
develop force at the same time
Muscle twitch - CORRECT ANSWER - the response of a muscle to a single brief
threshold stimulus
Muscle tetany - CORRECT ANSWER - The summation of many muscle fiber twitches.
Sliding filament: resting phase - CORRECT ANSWER - no tension in the muscle
Sliding filament: excitation-contraction phase - CORRECT ANSWER - SR releases
CA2+, binds to troponin, causing shift in tropomyosin; force production is directly related to # of
cross bridges formed
Sliding filament: contraction phase - CORRECT ANSWER - energy for cross bridge
formation comes from hydrolysis of ATP to ADP+Pi; another ATP must attach to myosin head
for it to detach from actin and recock; H-zone shrinks, I-zone shrinks
Sliding filament: recharge phase - CORRECT ANSWER - as long as Ca++ and ATP are
present contraction is repeated
Sliding filament: relaxation phase - CORRECT ANSWER - occurs when nerve stops
firing, Ca2+ pumped back into SR, preventing link between actin and myosin
Force production = - CORRECT ANSWER - # of formed cross bridges
