What happens when the pacemaker is non-functional ?, ( a) Only the auricles will contract rhythmically, (b) The cardiac muscles do not contract in a coordinated manner rhythmically, (c) Only ventricles will contract D) Cardiac muscles will contract in a coordinated manner rhythmically. Explain it.
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Please refer the solution below for the said query
The correct option is (b).
The cardiac muscles do not contract in a coordinated manner rhythmically when pacemaker is non functional.
Pacemaker (SAN) generates an action potential and both atria undergo contraction (Atrial systole).The action potential is conducted towards the ventricles through the AVN and the AV bundles, from where the bundle of His transmits this action potential over the entire cardiac musculature.The ventricles contract (ventricular systole) and the atria relax (atrial diastole) as a result of the conduction of action potential. This way all muscles work in coordinated manner rhythmically.
Hope this information clears your doubt about the topic.
Regards
Please refer the solution below for the said query
The correct option is (b).
The cardiac muscles do not contract in a coordinated manner rhythmically when pacemaker is non functional.
Pacemaker (SAN) generates an action potential and both atria undergo contraction (Atrial systole).The action potential is conducted towards the ventricles through the AVN and the AV bundles, from where the bundle of His transmits this action potential over the entire cardiac musculature.The ventricles contract (ventricular systole) and the atria relax (atrial diastole) as a result of the conduction of action potential. This way all muscles work in coordinated manner rhythmically.
Hope this information clears your doubt about the topic.
Regards