NURSING ANM AND GNM

NURSING EXAM QUESTIONS

PATHOLOGY AND GENETICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which one has pacemaker cells within them?
A
SA node
B
AV node
C
His bundle
D
Purkinje fibres
Explanation: 

Detailed explanation-1: -The sinus node continuously generates electrical impulses, thereby setting the normal rhythm and rate in a healthy heart. Hence, the SA node is referred to as the natural pacemaker of the heart.

Detailed explanation-2: -Cardiac Pacemaker Cells Are Specialized Cardiomyocytes With a Distinct Gene Expression Program. Pacemaker cells comprise a small population of specialized cardiomyocytes within the sinoatrial node (SAN) that spontaneously fire to trigger each heartbeat.

There is 1 question to complete.