Chemical substances secreted by cells into the extracellular fluids that regulate the metabolic function of other cells in the body are called ________.

Chemical substances secreted by cells into the extracellular fluids that regulate the metabolic function of other cells in the body are called ________.

Chemical substances secreted by cells into the extracellular fluids that regulate the metabolic function of other cells in the body are called ________. 










A) enzymes
B) antibodies
C) proteins
D) hormones










Answer: D