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A heartbeat is caused by an electrical impulse traveling through the heart. The heart's built-in electrical system controls the speed of its pumping. The electrical impulse originates in the sinus node which functions as the heart's natural pacemaker.
The sinus node is most often located in the top of the right atrium. The electrical signals travel through the heart tissue causing the atria and ventricles to contract and relax and the blood to be pumped to the body.
In the normal heartbeat, the automatic depolarization of cells in the sinoatrial (SA) node reaches a threshold level, causing a chain reaction throughout the cells of the atria, which then passes through the atrioventricular (AV) node down into the ventricles. This is the normal progression of electrical events.
There are specialized areas of cardiac muscle tissue (1%) in the heart that are autorhythmic (self-exciting). These cells compose the conduction system and are responsible for initiating and distributing cardiac (electrical) impulses throughout the heart muscle (i.e. cause the heart to beat).
These specialized areas together coordinate the events of the cardiac cycle, which makes the heart an effective pump.
Sinoatrial Node (S-A Node) is located in right uppermost atrial wall. It is often called the PACEMAKER and is self-exciting tissue (rhythmically and repeatedly [60-100 per minute) which begin cardiac impulses. It doesn't require any other nerve impulse and beats on its' own.
A small cluster of cells called the sinoatrial nodes initiate the contraction of the heart.
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Function of the brainstem?
it is responsible for vial life functions such as breathing heartbeat and blood pressure it is the most simple part of the human brain
Why does the left lower chamber of the heart manifest the stronger heartbeat?
The left lower chamber of the heart (also called left ventricle) is responsible of the nutrition of the entire organism (the systemic circulation), so it has to have the strongest heartbeat so that the blood can flow through all the tissues.
Which part of the heart makes the heartbeat sound?
A heartbeat produces the familiar "LUB-DUP" sounds as the chambers contract and the valves close. The first heart sound, "lub," is heard when the ventricles contract and the atrioventricular valves close. This sound last longest and has a lower pitch. The second heart sound, "dub," is heard when the relaxation of the ventricles allows the semilunar valves to close.
Where can I get piano chords for heartbeat by scouting for girls?
go on youtube and type in scouting for girls heartbeat and ask the person playing for the chords
What fire engines were used on Heartbeat?
carburetor
Who is the person responsible for initiating Arbor Day?
robert w.furnus
What blood component is responsible for initiating the clotting process?
platlets
What is the muscular organ responsible for initiating deglutition?
The tongue is the muscular organ responsible for initiating deglutition, or swallowing. It helps to move food towards the back of the mouth and into the pharynx, which then triggers the swallowing reflex.
What organelle is responsible for initiating photosynthesis in plant cells?
Chloroplasts are the organelles responsible for initiating photosynthesis in plant cells. They contain chlorophyll, a pigment that absorbs light energy and converts it into chemical energy through a series of reactions.
Which bone cell types is primarily responsible for initiating ossification of a bone?
osteoblast
What area of the brain is primarily responsible for controlling breathing and heartbeat?
medulla
What is the pacemaker in the right atrium called?
sinoatrial
What part of the brain is responsible for maintaining heartbeat?
Hypothalamus
What mechanism and or structure are responsible for initiating and controlling physiological responses?
Sympatho-Adrenal (SA) system and the Hypothalamic-Pituitary-Adrenal (HPA) system.
What hormone increases heartbeat?
nonsense i dint know the answer
What is it called when the heart beats in normal rhythm as long as it receive the correct balance of?
SA Node (Sinoatrial) responsible for initiating the heart beat pacemaker
Which of these blood components are responsible for initiating the clotting process?
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