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

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

Extracellular Fluids

Fluids located outside the cells, providing a medium for nutrient and waste transport in the body.

Metabolic Function

Refers to the complex set of life-sustaining chemical transformations within the cells of organisms, including catabolism and anabolism.

Chemical Substances

Compounds or elements that consist of atoms and molecules, having specific chemical and physical properties.