Question

Somatic Nervous System Concept Map using the terms below.

Neuromuscular Junction

Spinal Cord Ventral Horn

Somatic Motor Neuron

Axon Terminal

Skeletal Muscle Fiber

Motor Unit

Synaptic vesicles

Acetylcholine

Motor end Plate

Nicotinic receptors

Ligand Gated Na/K channels

Acetylcholinesterase

End Plate Potential

Muscle Action Potential

Answer 1

Spinal cord ventral horn

Gives rise to

Somatic motor neuron

Axon terminal of the neuron

The axon terminal has a complex structure called motor end plate which innervates the skeletal muscle fiber

It innervates skeletal muscle fiber

Motor unit is the combination of the axon terminal and the skeletal muscle fiber.

The innervation point is called neuromuscular junction.

The end plate potential causes the release of the synaptic vesicles

The axon terminal has synaptic vesicles which is released

The synaptic vesicles contain acetylcholine

The acetylcholine acts on nicotinic receptor present on the skeletal muscle fiber.

This leads to opening of ligand gated Na channel

This leads to muscle action potential

Acetylcholine is degraded by acetylcholinesterase.