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EXPH 386 EXAM 3 OE COMPLETE QUESTIONS AND ANSWERS (VERIFIED)
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EXPH 386 EXAM 3 OE COMPLETE QUESTIONS AND ANSWERS (VERIFIED)
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EXPH 386 EXAM 3 OE COMPLETE QUESTIONSAND ANSWERS (VERIFIED)
neuromuscular system
ANSWER = coordination and integration of the muscles and the nerves that supply them
cell body (soma)
ANSWER = action potential begins here, dictates the critical firing rate of the action potential
dendrites
ANSWER = neural branches that receive impulses and conduct them toward the cell body
axon
ANSWER = deliver action potentials to the motor endplate of the muscle. larger ______ = faster
conduction velocities
myelin sheath
,ANSWER = lipoprotein membrane that wraps around the axon, acts as an electrical insulator
schwann cells
ANSWER = create or deposit the myelin sheath
nodes of ranvier
ANSWER = interrupt the myelin sheath every 1-2 mm along the axon
salutatory conduction
ANSWER = allows the action potential to jump from node to node
slower
ANSWER = if no myelin were present, conduction velocities would be a lot ....
nerve terminal branches
ANSWER = multiple extensions of the axon that innervate individual muscle fibers
motor endplate / neuromuscular junction
ANSWER = interface between the end of the axon @ the terminal branch and the muscle fiber
,multinucleated cylindrical cells (fibers)
ANSWER = skeletal muscles of the body are composed of ___________ _________ ______ (_______)
which run parallel to each other. Force is directed along the long axis
fiber length
ANSWER = can vary from a few mm in small muscles (eye) to approx. 30 cm in large muscles (leg)
connective tissue layers associated with skeletal muscle
ANSWER = endomysium
perimysium
fasiculus
epimysium
tendons
periosteum
endomysium
ANSWER = wraps each muscle fiber and separates it from others
perimysium
ANSWER = bundle surrounding up to 150 fibers
, fasiculus
ANSWER = large bundle of fibers
epimysium
ANSWER = surrounds the entire muscle
tendons
ANSWER = extension of the epimysium at the ends of the muscle connecting to bone
periosteum
ANSWER = bones outermost covering; tendons connect the muscle to this
skeletal muscle structures
ANSWER = sarcolemma
basement membrane
sarcoplasm
sarcoplasmic reticulum
sarcolemma
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