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:
complement is a system of plasma protiens that can be activated directly by pathogens
Phagocytosis is the process by which immune cells engulf and then destroy bacteria
The answer is B) stop condons.
Stop codons, UGA, UAA, and UAG, are nucleotide triplets that signal to stop the translation of an mRNA sequence into proteins.
Answer:
A
Explanation:
The respiratory system allows for gas exchange, water and heat balance, and creation of sound and speech. I just took quiz and this 1 was right.
