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CBSE Class 10 Answered

Taking the example of the heart beat, justify the antagonistic action of sympathetic and parasymphathetic nervous system.

Asked by bhu.joshi54 | 14 Jun, 2022, 09:27: PM
Expert Answer
The autonomic nervous system comprises two different parts- the sympathetic and parasympathetic nervous system. The sympathetic nervous system activates the fight or flight response during a threat or danger, and the parasympathetic nervous system brings the body to a state of calm. 
 
Let us take the example of heart beat. 
Frequency of action potential produced by the pacemaker is under the control of sympathetic and parasympathetic nervous system. The sympathetic system increases contraction and rhythm and parasympathetic system decreases contraction and rhythm with respect to heartbeat. Sympathetic nervous system increase the frequency of action potential thus increasing the heart rate whereas antagonistically parasympathetic nervous system decrease the frequency of action potential thus lowering the heart beat. Both of them act antagonistically to control the heart beat.
Answered by Sheetal Kolte | 15 Jun, 2022, 12:27: PM
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