muscular system(nerve supply)

Motor neuron

nerve cells that carry action potentials to muscle fibers

Neuromuscular junction (synapse)

nerve cell and muscle fiber meet

Presynaptic terminal

end of nerve cell (axon)

Postsynaptic membrane

muscle fiber membrane

Synaptic cleft

space between presynaptic terminal and postsynaptic membrane

Synaptic vesicle

store and release neurotransmitters

Neurotransmitter

chemicals that stimulate or inhibit muscle fiber

Motor unit

group of muscle fibers that motor neuron stimulates

occurs as actin and myosin myofilaments slide past one another, causing the sarcomeres to shorten.

occurs as actin and myosin myofilaments slide past one another, causing the sarcomeres to shorten.