muscle vocab

vocabulary for muscle structure

16 cards·by uriza50

epimysium

surrounsds skeletal muscle and all fascicles in a muscle

perimysium

surrounds individual fascicles and seperates all muscle into compartmesnts

endomysium

surrounds individual muscle fibers

sarcolemma

cell membrane of a muscle fiber

sarcoplasm

cytoplasm of a muscle

myofibril

threads of protien in the sarcoplasm

myosin

thick protien filaments in the myofibril

actin

thin protien filament inside myofibril

I band

actin filaments attachd to z line

Z line

protien to which actin binds

A band

reigion where myosin overlaps actin

Sarcomere

unit pf a muscle from z line to z line

motor nueron

nerve cell that connects to muscle fiber

neuromuscular junction

connection between motor neuron and muscle fibers

neurotrasmitter

chemical that go from neuron to muscle fibers

motor unit

consists of motor and a muscle fiber