Answer: Serotonin
Explanation:
Serotonin is an hormone, derived from the amino acid, tryptothan. It is involved in vasodilation, sleep regulation, mood changes, capillary permeability, and causes contraction of smooth muscles like that of the stomach to signal hunger.
Answer:
animals would be your awnser you are welcome
Explanation:
Answer:
the vaccine causes the immune system to produce antibodies to the virus that causes the measles