NSCA CSCS Vocabularies Review (Latest 2023/ 2024 Update) Questions and Verified Answers | 100% Correct| Grade A

NSCA CSCS Vocabularies Review (Latest

2023/ 2024 Update) Questions and Verified

Answers | 100% Correct| Grade A

Q: perimysium

Answer:

covers bundles of muscle fibers (fascicli)

Q: endomysium

Answer:

surrounds each individual muscle fiber

Q: sarcolemma

Answer:

continuous with the muscle fibers membrane and endomysium

Q: motor neuron

Answer:

nerve cell

Q: neuromuscular junction

Answer:

where a nerve cell innervates muscle fibers, each muscle cell has only one, a motor neuron

innervates many muscle fibers

Q: motor unit

Answer:

motor neuron and the muscle fibers it innervates

Q: sarcoplasm

Answer:

cytoplasm of a muscle fiber, contains contractile components which consist of protein filaments,

other proteins, stored glycogen and fat particles, enzymes, and specialized organelles such as

mitochondria and the sarcoplasmic reticulum

Q: myofibrils

Answer:

contained in the sarcoplasm, contains myofilaments responsible for contracting the muscle

Q: myosin

Answer:

thick myofilament with cross bridges that protrude away at regular intervals

Q: cross bridges

Answer:

attached to myosin

Q: actin

Answer:

thin myofilament of two strands arranged in a double helix

Q: sarcomere

Answer:

smallest contractile unit of skeletal muscle

Q: A-Band

Answer:

dark corresponding with the alignment of myosin

Q: I-Band

Answer:

light corresponding actin of adjacent sarcromeres

Q: Z-Line

Answer:

in the middle of the I-Band, appears as a thin, dark line running longitudinally

Q: H-Zone

Answer:

area in the center of the sarcomere where only myosin filaments are present. During contraction,

this decreases as actin slides over the myosin toward the center of the sarcomere

Q: sarcoplasmic reticulum

Answer:

system of tubules surrounding each myofibril

Q: T-Tubules

Answer:

run perpendicular to the sarcoplasmic reticulum and terminate in the vicinity of the z-line

between two vesicles

Q: action potential

Answer:

electrical nerve impulse

Q: sliding filament theory

Answer:

actin filaments at each end of the sarcomere slide inward on myosin filaments, pulling z-lines

toward the center of the sarcomere and thus shortening the muscle fiber

Q: troponin

Answer: