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

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


D
Explanation:
A) Proteins are not chemical substances that are secreted into extracellular fluids.
B) Enzymes are not chemical substances secreted into extracellular fluids.
C) Antibodies are not chemical substances that are secreted into extracellular fluids.

Anatomy & Physiology

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