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.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.