Question

Epinephrine and norepinephrine act both as hormone and

• A. Neurotransmitter
• B. Carcinogens
• C. Enzyme
• D. All of the above

Answer 1

Answer: (A)

Neurotransmitter

Epinephrine is released by adrenal gland into the blood and functions as a hormone. Norepinephrine is released by neurons in the brain where it acts as a neurotransmitter. Carcinogens are neither hormones nor neurotransmitter they are substances that affect cell division leading to cancer. An enzyme is a catalyst that helps in different processes of metabolism. So, the correct answer is option A.