Which of the following statements is correct regarding neural regulation of cardiac activity?

The cardiac centre lies in medulla oblongata of brain.

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Sympathetic nerve fibres accelerate the rate of heart beat and parasympathetic nerve fibres retard the rate of heart beat.

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Sensory fibres extend from the receptors present in the walls of aortic arch, carotid sinuses and vena cava to the cardiovascular centre in medulla oblongata.

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All of these

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Solution

The correct option is D All of these
The medulla oblongata of the brain controls cardiac activities.
The action of sympathetic nerve fibres increases the heart rate, while that of the parasympathetic nerve fibres decrease it.
Sensory fibres extend from the receptors present in the walls of the aortic arch, carotid sinuses and vena cava to the cardiovascular centre in the medulla oblongata.
Thus, the correct answer is 'All of these.'

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Similar questions

The (i)___, controls both the heart rate and the stroke volume. There are two separate nerves from the cardiovascular centre to the sinoatrial node: the (ii)___, to speed up the heart rate and the (iii)___, to slow it down. These two receptors receive information from special cells called (iv)___, present in the aortic arch and in the carotid sinus.

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 cardiac functions can be moderated by neural signals from special neural centre in the medulla oblongata?
a. Rate of heart beat
b. Cardiac output
c. Speed of conduction of action potential
d. Strength of ventricular contraction and thereby the cardiac output.

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

The (i)___, controls both the heart rate and the stroke volume. There are two separate nerves from the cardiovascular centre to the sinoatrial node: the (ii)___, to speed up the heart rate and the (iii)___, to slow it down. (i) receives information from special cells called (iv)___, present in the aortic arch and in the carotid sinus.

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