Muscle Notes #11 (NMJ)

Where the terminal end of a motor neuron axon meets the sacrolemma of a muscle fiber.

A space between the neuron and sarcolemma.

• Each muscle is served by 1+ motor nerves.

• Each motor nerve contains axons of hundreds of motor neurons.

The distal end of the motor neuron axon; also called motor end plate.

• Releases the neurotransmitter acetylcholine (ACH) into the synaptic cleft.

At the NMJ, the electric impulse from the nerve is converted into the neurotransmitter, __.

ACH diffuses across the synaptic cleft and binds to receptors on the sarcolemma to begin a __.