The answer is d. the amino acid
Answer:
The answer is Norepinephrine.
Explanation:
Acetylcholine (Ach) and Norepinephrine (NE) are both chemical substances (neurotransmitters) released primarily by nerve cells and they affect different parts and systems of the body. Acetylcholine mostly targets the muscles and the brain and it is a part of the parasymphatetic nervous system whereas norepinephrine targets the whole body and has an effect that leads to the contraction of muscles and the increase of the heart rate. Norepinephrine is a part of the symphatetic nervous system.
Since the symphatetic nervous system is responsible for the crucial "fight-or-flight" response of our body, it has a more dramatic effect on the muscle contraction. Norepinephrine, being a part of the symphatetic nervous system, should result in a more drastic change in contractile force.
I hope this answer helps.
The digestive system works<span> very closely with the </span>circulatory system<span> to </span>get<span> the absorbed nutrients distributed through </span>your body<span>. The </span>circulatory system<span> also carries chemical signals from </span>your<span> endocrine </span>system<span> that control the speed of </span>digestion<span>. Hope this helps</span>
Diploid saprophytic generation with haploid gametophytic generation
