Question

Taking the example of heart beat, justify the antagonistic action of thesympathetic and the parasympathetic nerves.

Answer 1

Hey there,

Sympathetic neural signals can increase the rate of heart beat and the cardiac output

Parasympathetic neural signals decrease the rate of heart beat and cardiac output

Hope this helps

Answer 2

The antagonistic action of the sympathetic and the parasympathetic nerves system is as follows:    

Explanation:

• The pacemaker is a device which is used in the heart to regulate the contraction and relaxation of heart muscles to facilitate the pumping of blood from the heart.
• The frequency of the action potential in the heart used for pumping of blood is regulated by the pacemaker.
• This frequency is controlled by the parasympathetic and sympathetic nervous system.
• The sympathetic nervous system has a role for increasing the frequency of the action potential by increasing the pumping action of heart whereas the parasympathetic nervous system has a role of reducing or decreasing the frequency of the action potential by lowering the heart rate.

Learn more about sympathetic nervous system:

Distinguish between sympathetic nervous system and parasympathetic nervous system: https://brainly.in/question/7524277