HUMAN PHYSIOLOGY
BODY FLUIDS AND CIRCULATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
in the wall of right atrium
|
|
|
On interauricular septum
|
|
|
On interventricular septum
|
|
|
In the wall of left atrium
|
Detailed explanation-1: -The pacemaker or Sino Atrial Node is situated in the upper right corner of the walls of the right atrium of the heart. The pacemaker initiates the heartbeat and controls the heartbeat.
Detailed explanation-2: -Your heart’s sinus node is your natural pacemaker (found in the upper right chamber of the heart, known as the atrium). It sends an electrical impulse to make your heart beat.
Detailed explanation-3: -The sinus node is the heart’s natural pacemaker. It’s a small mass of specialized cells in the top of the right atrium (upper chamber of the heart). It produces the electrical impulses that cause your heart to beat.
Detailed explanation-4: -The sinoatrial node (SA) node serves as a pacemaker and is a small mass of specialized cardiac muscle. It is present in the posterior wall of the right atrium near the opening of superior vena cava. Thus, the correct answer is option A.