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An area of the heart known as the pacemaker, that sets a steady contraction of the heart without any control from the nervous system, usually around 40 bpm. Incorrect, The sinus node or the SA node is a small group of cells in the right atrium of the heart. It is also known as the sinoatrial node or the heart normal pacemaker. The sinus node produces 60-100 electrical impulses per minuet. NERVES ARE used in the heart- the sympathetic and the paprasampathetic nerves- two sets of chemicals neropineprine and epinphrin For more information please visit http://wiki.answers.com/Q/How_heart_works&alreadyAsked=1
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What controls the firing of the sinus node to trigger the start of the cardiac cycle?
Sinus node
What is the internal pacemaker of the heart called?
SA node (Sinus Node)
Which heart structure does the pacemaker substitute?
The SA Node.
What is natures pacemaker?
sinus node
What is a sinus rhythm?
When the heart is functioning properly the sinus node controls the firing of action potential that contract the heart. When the sinus node dominates the heart will contract in a synchronized and effective rhythm This is called sinus rhythm.
What is the internal pacemaker of the human heart called?
SA node (Sinus Node)
What is sinus arrest?
When the Sino-atrial node fails momentarily to initiate an impulse, sinus arrest occurs. When the sino-atrial node fails momentarily to initiate an impulse, sinus arrest occurs.
What is the most important structure of the human heart?
It is supposed to be the sinus node and the conducting tissue. It includes the AV node and bundle of HIS. The sinus node generate the impulse in the heart for contraction. The AV node and bundle of HIS transmits the impulse to the ventricles.
What is sinus braydicardia?
Sinus bradycardia is basically a decreased heart rate. It originates from the sinus node and will be under 60 beats per minute.
Where in the heart is the heart beat controlled?
Simple answer is sinus node
What is the main pace maker of the heart?
The primary pacemaker of a normal healthy heart is the sinus node (or SA node). It is located in the right atria of the heart.
What are the spaces within a lymph node called?
It's called the subcapsular sinus
