Which division of the nervous system predominantly influences the SA and AV nodes?
Understand the Problem
The question is asking about which part of the nervous system primarily affects the sinoatrial (SA) and atrioventricular (AV) nodes in the heart. It involves understanding the functions of different nervous system divisions and their influence on cardiac activity.
Answer
Parasympathetic nervous system
The parasympathetic nervous system predominantly influences the SA and AV nodes.
Answer for screen readers
The parasympathetic nervous system predominantly influences the SA and AV nodes.
More Information
The parasympathetic nervous system, primarily through the vagus nerve, regulates heart rate by slowing down the impulses generated by the SA (sinoatrial) and AV (atrioventricular) nodes. This function contrasts with the sympathetic nervous system which accelerates heart activity.
Sources
- Vagus Nerve - Physiopedia - physio-pedia.com
- Part and Parcel in Cardiac Autonomic Innervation and Function - frontiersin.org
- The web page with info on - Example Source - emedicine.medscape.com
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