What does a motor endplate do?

Embedded in the end plate are thousands of receptors, which are long protein molecules that form channels through the membrane. Upon stimulation by a nerve impulse, the terminal releases the chemical neurotransmitter acetylcholine from synaptic vesicles.

Why is the motor end plate folded?

The motor end-plate has folds in the sarcolemma, called junctional folds, that create a large surface area for the neurotransmitter to bind to receptors.

What are end plates of a motor?

Neuromuscular junctions, also called motor end plates, are specialised chemical synapses formed at the sites where the terminal branches of the axon of a motor neuron contact a target muscle cell.

Where is the motor endplate?

The specialized postsynaptic region of a muscle cell. The motor endplate is immediately across the synaptic cleft from the presynaptic axon terminal. Among its anatomical specializations are junctional folds which harbor a high density of cholinergic receptors.

What happens after motor end plate Depolarizes?

Depolarization of the motor end plate occurs when both receptors bind acetylcholine, causing a conformational change in the channel complex, opening it to the inward flow of positive ions (Figure 19-2).

What is motor end plate Class 11?

Hint: Motor end plate is a chemical synapse junction. It helps the motor neuron to transmit signal to the fibres of muscles which causes muscle contraction. It initiates the secretion of acetylcholine which helps in transmission of impulses. Complete answer: The motor end plate is known as neuromuscular junction.

What causes an end-plate potential?

End plate potentials are produced almost entirely by the neurotransmitter acetylcholine in skeletal muscle. Acetylcholine is the second most important excitatory neurotransmitter in the body following glutamate. It controls the somatosensory system which includes the senses of touch, vision, and hearing.

What happens when an action potential reaches motor end plates?

Terms in this set (18) What happens when an action potential reaches motor end plates? A. Calcium ions are absorbed by the muscle fibres.