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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?
Options:
(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?
Solution:
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Verified Answer
The correct answer is:
(i) and (iii)
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)
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