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NSCA CSCS Chapter 1 Exam Questions with Answers

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NSCA CSCS Chapter 1 Exam Questions with Answers neuromuscular junction - Answer-junction between motor neuron and muscle fibers it innervates motor unit - Answer-motor neuron and muscle fibers it innervates myofibrils - Answer-contain the apparatus that contracts muscle cells myofilament...

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  • August 17, 2024
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  • 2024/2025
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NSCA CSCS Chapter 1 Exam Questions
with Answers
neuromuscular junction - Answer-junction between motor neuron and muscle fibers it
innervates

motor unit - Answer-motor neuron and muscle fibers it innervates

myofibrils - Answer-contain the apparatus that contracts muscle cells

myofilaments - Answer-actin and myosin

myosin - Answer-thick filament

actin - Answer-thin filament

longitudinally - Answer-mysoin and actin arranged this way in the sarcomere

sarcomere - Answer-smallest contractile unit of skeletal muscle

m bridge - Answer-connects ajacent myosin filaments

h zone - Answer-center of sarcomere

z line - Answer-anchors actin filaments

a band - Answer-dark corresponds with alignment of myosin filaments

i band - Answer-light corresponds with actin filaments

z line - Answer-middle of i band and thin dark line ongitutindally through i band

h zone - Answer-center of sarcomere

h zone - Answer-decreases as actin slides over myosin

i band - Answer-decreases as z lines are pulled toward center of sarcomere

sarcoplasmic reticulum - Answer-surrounds myofibrils parralel to them, terminates as
vesicles in vicinity of z line

sarcoplasmic reticulum - Answer-stores calcium ions

, t tubules - Answer-run perpendicular to sarcoplasmic reticulum and terminates between
sarcoplasmic reticululm

action potential - Answer-an electrical nerve impulse

action potential - Answer-signals motor neurons to release calcium from sarcopalasmic
reticulum into myofibril = tension development

sliding filament theory - Answer-actin filaments at end of sarcomere slide inward over
myosin filaments, pulling z lines toward center and shortening muscle = contraction

h zone and i band - Answer-shrink during sliding filament theory

troponin - Answer-calcium binds to this; protein situated at regular intervals along actin
filament

tropomyosin - Answer-protein molecule runs length of actin filament in the groove of the
double helix

crossbridges - Answer-number of these formed between actin and myosin dictates force
production

cerebral cortex - Answer-part of brain that controls skeletal muscles

musculoskeletal system - Answer-consists of bones, joints, muscles, and tendons

muscles - Answer-function by pulling against bones that rotate about joints and transmit
force to the enviornment

muscles - Answer-can only pull

positvely affect adult skeleton - Answer-body subjected to heavy loads, explosive
movements, loaded axial skeleton

heavy loads - Answer-lifting these increases bone density and bone mineral content

explosive - Answer-movement type for increasing bone density and bone mineral
content

bone - Answer-adaptation of this takes longer than muscle

206 - Answer-number of bones in body

bones - Answer-provides leverage, support, and protection

axial skeleton - Answer-consists of the skull, vertebral column, ribs, and sternum

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