That would be the Endocrine system which secretes hormones into the blood through glands
Answer: A
Explanation:
Enzymes that catalyze endergonic reactions are likely to bind to ATP ,short for Adenosine Triphosphate. Adenosine triphosphate is the high-energy molecule that stores energy.
In cells, The hydrolysis of ATP provides the energy needed for an endergonic reaction which requires this energy to be acquired from the surroundings.
Answer:
potassium, sodium, calcium, sulfate, magnesium, and chloride