First slide

Circulatory Pathways

Question

Atrio-ventricular node is present in the

Easy

A

right upper corner of the right atrium
B

right upper corner of the left atrium
C

left lower corner of the right atrium
D

left lower corner of the left atrium

Solution

Atrio-ventricular node (AVN) is a mass of nodal tissue is seen in the lower left corner of the right atrium close to the atrio-ventricular septum. Sino-atrial node (SAN) is present in the right upper corner of the right atrium
The nodal musculature has the ability to generate action potentials without any external stimuli, i.e., it is autoexcitable. However, the number of action potentials that could be generated in a minute vary at different parts of the nodal system. The SAN can generate the maximum number of action potentials, i.e., 70-75 min^–1, and is responsible for initiating and maintaining the rhythmic contractile activity of the heart. Therefore, it is called the pacemaker.

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App