The structures are already listed, I will go ahead to explain the event that happens at the neuromuscular junction which is also known as the SYNAPSE ,as I do that, I will make mention of all the structures listed and represented in the picture.
In Synapse,there is always more than one neurone involves in the transmission of a nerve impulse from it's point of origin to it's destination. Whether it is a sensory nerve or motor nerve,no physical contact exist between the two neurons.
The exact point at which the neurone moves from the presynaptic neurone to the postsynaptic neurone,at the free end,the axon of the presynaptic neurone breaks up into minute branches that further terminate into small swellings that is known as synaptic knobs or the terminal buttons.
These synaptic knobs are in close range to the dendrites and the cell body of the postsynaptic neurone.
The space between them is known as the synaptic cleft.
The synaptic knobs contains membrane bound synaptic vessicles which are spherical in shape,these membrane bound vesicles store a chemical that is known as the neurotransmitter which is released into the synaptic cleft.
These neurotransmitters are synthesized in the nerve cell bodies and they are actively transported along the axons and then stores in the synaptic vesicles. In response to the action potential,they are released by exocytosis and then diffuse across the synaptic cleft.
They act on receptor sites that are specific in nature on the post synaptic membrane.Immediately they act upon the post synaptic cell,such as a muscle fibre,they either get inactivated by enzymes or they are taken back into the synaptic knobs,hence, their action is short lived.
Neurotransmitters most times exert an excitatory effect on postsynaptic receptors but sometimes they are also inhibitory.
However,some drugs that are important has a way of mimicking, neutralising (antagonise) or prolong neurotransmitter activity.
As per the pink line, the arrow depicts the propagation of the action potential by the synaptic cleft and synaptic vesicle containing ACH. Thus option E is correct.
A synapse is also called a neurological junction and is the site of the transmission of electronic nerve impulses. These occur between the two nerve cells and take place between the neuro and gland cells. The synaptic connection between them is called a neuromuscular junction.
The substances transmitted the nerve impulses to the postsynaptic fibers by using diffusion across the cleft and binding receptor molecules on the membrane. The synaptic vesicles consist of the ACh.
Find out more information about the neuromuscular.
brainly.com/question/16995229.
