What is creatinine?
A. A hormone produced by the adrenal gland.
B. A protein found in muscle tissue.
C. A waste product produced during muscle metabolism.
D. A neurotransmitter produced by the brain.
Answer:C
What is creatinine?
A. A hormone produced by the adrenal gland. B. A protein found in muscle tissue. C. A waste product produced during muscle metabolism. D. A neurotransmitter produced by the brain.