The nurse is discussing the endocrine system with a class of nursing students. What substance would the nurse label as a hormone?
A) Acetylcholine
B) Norepinephrine
C) Nucleic acid
D) Serotonin
B
Feedback:
A hormone is secreted directly into the bloodstream and travels from the site of production to react with specific receptor sites to cause an action. Norepinephrine, which is a neurotransmitter, is a hormone when it is produced in the adrenal medulla, secreted into circulation, and travels to norepinephrine receptor sites to cause an effect. Acetylcholine and serotonin are neurotransmitters, but are not hormones. Nucleic acid is used to build deoxyribonucleic acid and ribonucleic acid.
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