Answer:
By action potential nerve contract the muscle
Explanation:
The muscle contract when the nervous system sends action potential to the muscle. So the nervous system delivers signal to muscle, the first signal reaches the neuromuscular junction. The signals are passed by a chemical messenger called neurotransmitter release by motor neurons, the chemicals bring reaction and shorten the muscle fibre. When neurotransmitter are absent or reduce in concentration the process reverse and muscle relax again.
E. very small atoms
fusion reaction in which two atoms of hydrogen combine together or fuse to form an atom of helium
Answer:
that allele pairs separate during the formation of gametes. This means that traits are transmitted to offspring independently of one another.
Explanation:
