The answer to this question is Neurotransmitter
Neurotransmitter will create a chemical change inside our body as a response to each situation that we face. This response then will be transmitted toward our body and will determine what we should do next, (this process will be a lot easier to observe during dangerous fight or flight situations)
Answer: The plasma membrane is an extremely pliable structure composed of 2 layers of back-to-back phospholipids (a “bi-layer”). Cholesterol is also present between the phospholipids, which contributes to the fluidity of the membrane. There are various proteins embedded within the membrane that have a variety of functions.
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Answer:
The central nervous system contains the brain, which is the center of the nervous system, and the spinal cord, which coordinates simple reflexes.
Answer:
Some changes in the DNA sequence will not cause a change in the protein produced.
Explanation:
My reasoning is, if the mutation is not expressed then the changes in the DNA sequence will not affect the coding for whatever protein will be produced. The mutation won't affect anything, it is like the mutation is invisible. I hope it helps plus by process of elimination the others would be wrong.