Norepinephrine

Is released by sympathetic fiberes

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Is released by parasympathetic fibres

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Decrease the heart rate

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Decrease blood pressure

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(A) and (d)

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Solution

The correct option is C Is released by sympathetic fiberes
A. Is released by sympathetic fibers
EXPLANATION: Norepinephrine is also known as noradrenaline. It is released by the sympathetic fibers of the adrenal glands and it is a neurotransmitter. A neurotransmitter is a chemical messenger, which transmits signals across nerve endings in the body. It increases the heart rate.

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Similar questions

The cardiac activity could be moderated by the autonomous neural system.
Tick the correct answer.
(a) The parasympathetic system stimulates heart rate and stroke volume
(b) The sympathetic system stimulates heart rate and stroke volume
(c) The parasympathetic system decrease the heart rate but increase stroke volume
(d) The sympathetic system decreases the heart rate but increases stroke volume

Q. Statement 1: Parasympathetic neural system increases the rate of heart beat.
Statement 2: Sympathetic neural system decreases the rate of heart beat.

Q. Which of the following can increase the rate of heart beat?
(A) Sympathetic neural signal
(B) Parasympathetic neural signal
(C)Adrenal medullary hormones
(D) Vagus nerve
(E) Thyroxine hormone
(F) Acetylcholine

Q. Distinguish between the following pairs:
(a) Fenestra rotunda and fenestra ovalis,(b) Adrenergic and cholinergic nerve fibres (c) Grey matter and white matter,(d) Effects of sympathetic and parasympathetic nerves on the heart, pupil, blood vessels and blood pressure,(e) Conduction of nerve impulse m myelinated and non-myelinated nerve fibres,(f) Resting potential state and action potential state

The function of our visceral organs is controlled by

(a) sympathetic and somatic neural system

(b) sympathetic and parasympathetic neural system

(d) None of the above

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