The Neuromuscular Junction-Timeline

The x is where a motor neuron synapses with a muscle fiber

Neuromuscular junction

The contraction of a skeletal muscle begins when an action potential travels down the axon of a x to its axon terminal

Motor neuron

At the axon terminal, the action potential stimulates the opening of x

Voltage-gated Ca channels

The opening of voltage gated ca channels allow x ions to diffuse across the axon terminal membrane

Ca

Calcium ions binds to x

Synaptic vesicles

Synaptic vesicles are filled with x a transmitter which makes them fuse to axon terminal membrane

Acetylcholine

Fusion causes synaptic vesicles to release acetylcholine into the x

Synaptic cleft

Once in synaptic cleft, acetylcholine binds to x

Chem gated sodium ion channel

Chem gated sodium ion channels opens and allows x ions to diffuse

Sodium

Sodium ions diffuse across the x

Sarcolemma

Diffusion of sodium ions across sarcolemma creates another x

Action potential