20 points! this is an anatomy question. at a myoneural junction, what is the function of the motor end plate? to release neurotransmitters that travel toward the axon terminal to bind neurotransmitters and generate an action potential in the sarcolemma to release sodium and potassium that travel toward the axon terminal to bind sodium and potassium and generate an action potential in the sarcolemma

To bind neurotransmitters and generate an action potential in the sarcolemma

Explanation:

A Myoneural junction is also known as A neuromuscular junction that basically is a chemical synapse which is created when a  motor neuron contacts a muscle fiber. This  synapse made between a spinal motor neuron and skeletal muscle cell has a specific structure due to which it is called the motor endplate.

Now what is the function of this motor endplate?

We already know that in response to a stimuli a series of events start in nervous system which lead to the production of a response. For example, when we touch a hot object a signal travels through Central nervous system and the response occurs when we move our hands away from the hot object.

Now, taking this same example, what happens is that when a response has to be produced , for example muscle contraction, the neurons which act there are called motor neurons. When the motor nerve is stimulated due to arrival of a nerve impulse in the motor nerve terminals, the first response occurs with the help of motor endplate.

The arrival of motor neuron causes an action potential at presynaptic neuron terminal that opens up  calcium channels and Ca2+ ions  into the presynaptic neuron's cytosol causing several neurotransmitter molecules to fuse with the presynaptic neuron's cell membrane

Here, the neurotranmsitters like acetylcholine binds with the receptors present in the motor end plate. As soon as they bind with the receptors on motor end plate,  an influx of Na+ ions occurs that  triggers an action potential. When action potential is triggered it  travels along the sarcolemma and into the muscle fiber which initiate the muscle contraction. This muscle contraction is the response to a certain stimuli and in the example we discussed it will be bringing our hand away from the hot object.

This is a long and complex mechanism which i tried to summarize, You can get a better idea by looking at the diagram attached.

structure is maintained and sustained by:

-cytoskeleton: gives cells coherence

-cell wall: support

-cytoplasm: shape

hope this .

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.