Which is responsible for initiating and maintining the rhythmic contractile activity of the heart ?

Which of the following statements are correct about Sino-atrial node A) It is responsible for initiating and maintaining the rhythmic contractile activity of the heart B) It is auto-excitable and generates 70 - 75 action potentials per minute C) It sets the pace of the activities of the heart and is called pacemaker

Assertion : The sino-atrial node (SAN) is called the pacemaker. Reason : SAN is responsible for initiating and maintaining the rhythmic contractile activity of the heart.

Assertion : The sino-atrial node (SAN) is called the pacemaker. Reason : SAN is responsible for initiating and maintaining the rhythmic contractile activity of the heart.

Assertion : Sino-atrial node (SAN) is called the pacemaker Reason : SAN generates the maximum number of action potentials and is responsible for intiating and maintaining the rhythmic contractions of the heart.

Assertion : Sino-atrial node (SAN) is called the pacemaker Reason : SAN generates the maximum number of action potentials and is responsible for intiating and maintaining the rhythmic contractions of the heart.

Assertion : Sino-atrial node (SAN) is called the pacemaker Reason : SAN generates the maximum number of action potentials and is responsible for intiating and maintaining the rhythmic contractions of the heart.

Which part of heart is responsible for initiating and maintaining its rhythmic activity?

Which part of heart is responsible for initiating and maintaining its rhythmic activity.

A patch of nodal tissue responsible for initiating the rhythmic contractile activity of heart is present in