GENERAL ANATOMY
ANATOMY OF THE HEART
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Th Av node is the pacemaker
|
|
|
In normal sinus rhythm, the electrical signal arises within the SA node
|
|
|
The His-Purkinjie system spreads the electrical signal from the right atrium to the left atrium
|
|
|
The purple of the AV node is to increase the speed at which the cardiac impulse moves from the atria to the ventricles
|
Detailed explanation-1: -Which of the following statements is true about the SA (sinoatrial) node? The pacemaker cells, which establish the heart rate, are located in the SA node.
Detailed explanation-2: -The SA node starts the sequence by causing the atrial muscles to contract. That’s why doctors sometimes call it the anatomical pacemaker. Next, the signal travels to the AV node, through the bundle of HIS, down the bundle branches, and through the Purkinje fibers, causing the ventricles to contract.
Detailed explanation-3: -Normal sinus rhythm (NSR) is an atrial rhythm caused by electrical activation that originates from the sinus node, a structure located in the area of the junction of the right atrium and superior vena cava.
Detailed explanation-4: -The correct answer is E. SA node, AV node, bundle of His, Purkinje fibres.