All the components of the nodal tissue are au | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The nodal tissue of the heart is autoexcitable,meaning it can generate action potentials without external stimuli.However,the rate of generation o

Vedclass · Accepted Answer

$SA$ node has the highest rate of depolarisation.

Vedclass · Answer

(D) The nodal tissue of the heart is autoexcitable,meaning it can generate action potentials without external stimuli.However,the rate of generation of action potentials varies among different components of the nodal tissue.The $SA$ node (Sinoatrial node) has the highest rate of depolarisation,generating approximately $70-75$ action potentials per minute.Because it initiates the impulse faster than any other part of the conduction system (like the $AV$ node or Purkinje fibers),it sets the pace for the entire heart.Therefore,the $SA$ node acts as the natural pacemaker of the heart.

All the components of the nodal tissue are autoexcitable. Why does the $SA$ node act as the normal pacemaker?

Similar Questions

The human heart lies in the space present between the two lungs,which is called . . . . . . .

The sequence of electrical impulse conduction in a heartbeat is:

What is meant by cardiac output?

Given below are two statements.
Statement $I$ - The heart sound $Dub$ is heard during ventricular diastole.
Statement $II$ - The heart sound $Lubb$ is heard during atrial systole.
In the light of above statements,select the correct option given below:

Bicuspid and tricuspid valves open when:

Vedclass Test Series

Exam Paper Generator

Online Exam Module