Muscle Vocabulary

16 cards·by biology

Epimysium

surrounds skeletal muscle and all fascicles in a muscle

Perimysium

sourrounds individual fascicles ans seperates muscle into small compartments

Endomysium

surrounds individual muscle fiber

Sarcolemma

all membrane of a muscle fiber

Sarcoplasm

cytoplasm of a muscle fiber

Myofibril

threads of protein inside the sarcoplasm

Myosin

thick protein filament inside a myofibril

Actin

thin protein inside a myofibril

I band

actin filaments attched to z-line

Z-line

protein to which actin binds

A band

region where myosin overlaps actin

Sacromere

unit of muscle from z-line to z-line

Motor Neuron

nerve cell that connects to muscle fiber

Neuromuscular Juntion

connection between motor neuron to muscle fiber

Neurotransmitter

chemical that go from neuron to muscle fiber

Motor Unit

consists of motor neuron and muscle fiber