Question

Norepinephrine
(i) is released by sympathetic fibers
(ii) is released by parasympathetic fibers
(iii) increases the heart rate
(iv) decreases blood pressure. Which of the above statements are correct?

• A. (i) and (iii)
• B. (ii) and (iii)
• C. (ii) and (iv)
• D. (i) and (iv)

Answer 1

Answer: (A)

Norepinephrine is secreted by some neurons of the sympathetic nervous system and also by adrenal medulla. It accelerates heart rate.