Answer: C. It provides information about what is already known about a particular research question.
Background research is a research which is done before designing a new research plan. This involves a review of complete history and nature of research problem with respect to the existing literature. Therefore, background research provides already known information about a particular research.
Answer:
I'm not sure if this is correct but I think it's C
In the given case, acetylcholine and norepinephrine are the neurotransmitters that may be present at the greater concentrations.
Norepinephrine refers to a neurotransmitter, which is essential for emotions, attentiveness, dreaming, sleeping, and learning. It is also discharged as a hormone in the bloodstream, where it enhances the rate of heart and makes the blood vessels to contract.
Another neurotransmitter known as acetylcholine refers to the chemical, which the motor neurons of the nervous system discharge to stimulate the muscles.
