15. What's the requirement of every single natural process on Earth?
answer: Energy source
The Nervous System is mainly divided into two parts which are the Central Nervous System (CNS) and the Peripheral Nervous System (PNS).
The nerve fibers that send impulses to slow the heart's rate of contraction belongs to the PNS, particularly under the Autonomic Nervous System. This is where impulses can't be directly controlled by the brain, and the body does these things automatically in order to adapt to a particular situation.
A physical change will not change the composition or identity of the substance.
Answer: Poor nutrition won't provide healthy amounts of energy to the body. The lack of nutritional vitamins that the body needs can lead to a change in hormonal signals, stimuli, and metabolites.
Hope this helps :)