Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account

A motor nuron and all of the skeletal muscle cells it stimulates is called a ______?

Motor unit

The axon of each motor neuron has numerous endings called______?

Axon terminals

The actual gap between an axonal ending and the muscle cell is called a ______?

Synaptic cleft

Within the axonal endings are many small vesicles containing a neurotransmitter substance called _____?


When the _____ reaches the ends of the axon, the neurotransmitter is released, and it diffuses to the muscle cell muscle cell membrane to combine with receptors there

Nerve impulse

Prime mover

The muscle that has the major responsibility for causing a particular movement


Muscles that oppose or reverse a movement


Help prime movers by producing the same movement or by reducing undesirable movements


Are specialized synergist


1 outside muscle


2 surrounds fascicle


3 bundle of muscle cells


4 Around muscle cell

Thick filament

Middle part, that has myosin

Thin filaments

Attached to the z discs, that has actin filaments


5 filamentous organelle

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording