Nor epinephrine is secreted by some neurons of the sympathetic nervous system and also by adrenal medulla. It accelerates heart rate, while epinephrine is secreted by parasympathetic nervous system and decrease blood pressure. (Ref. to Fig. 14.7) Related Theory 
Norepinephrine: (i) is released by sympathetic fibers (ii) is released by parasympathetic fibers (iii) increases the heart rate (iv) decreases blood…
NEET UG 2013 — Zoology Chemical Coordination and Integration
2013mcqmedium
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?
Official previous-year question
Held on 30 Apr 2013 · Verified 9 Jul 2026.
Options
- A
(i) and (iii)
- B
(ii) and (iii)
- C
(ii) and (iv)
- D
(i) and (iv)
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