You are hiking in the wood and you get bit by a snake. your heart rate increases. which neurotransmitter is released at your heart to increase the rate of muscle contraction? A. norepinephrine
B. acetylcholine
C. both norepinephrine and acetylcholine
D. not eniugh information is given to answer

b.have there own function.

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation:

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.