A & P Lab- Ex 12: Skeletal Muscle

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muscle fiber

A single muscle cell is referred to as a _____.

sacromere

Basic contracting unit of muscle cell consits of actin and myosin filaments between z-lines in a muscle cell

tendon

Connects muscle to bone

neuromuscular junction

Site of communication between motor neuron and muscle fiber. Uses acetylcholine (Ach) for depolarization of the cell

endomysium

Surrounds individual muscle fibers

myofilaments

The contractile proteins, actin and myosin, of muscle cells

myosin

Thick filament

actin

Thin filament

fasicle

bundle of muscle fibers

aponeurosis

strong sheet of tissue that acts as a tendon to attach muscles to bone

epimysium

surrounds entire muscle

perimysium

surrounds fascicles.

myofibril

tightly packed filament bundles found within skeletal muscle fibers


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