Norepinephrine:
(1) Is released by sympathetic fibres
(2) Is released by parasympathetic fibres
(3) Increases the heart rate
(4) Decreases blood pressure
Which of the above said statements are correct?

Options

(a) (1) and (4)
(b) (1) and (3)
(c) (2) and (3)
(d) (2) and (4)

Correct Answer:

(1) and (3)

Explanation:

Norepinephrine is released by sympathetic fibres i.e., rapidly secreted in response to stress of any kind and during emergency situation. It increases the heart beat, the strength of heart contraction and the rate of respiration.