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19.Chemical Coordination and Integration
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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 ?
A
$(i)$ and $(iii)$
B
$(ii)$ and $(iii)$
C
$(ii)$ and $(iv)$
D
$(i)$ and $(iv)$
(NEET-2013)
Solution
(a) : Norepinephrine is secreted by some neurons of the sympathetic nervous system and also by adrenal medulla. It accelerates heart rate.
Standard 11
Biology
