What Initiates A Heartbeat. The blood in the atria empties into the ventricles. The electrical impulse starts on the right side of the upper.
The electrical signal travels through the atria, causing them to pump blood into the. Upon stimulation by the action potential, myocardial cells contract synchronously, resulting in a heartbeat.
A Timely And Efficient Mechanical Oscillation,.
The electrical impulse starts on the right side of the upper.
The Signal Begins In A Group Of Cells, Called Pacemaker Cells, Located In The Sinoatrial (Sa) Node In The Right Atrium.
First, since each electrical impulse generates one heartbeat, the number of electrical impulses determines the heart rate.
Several Factors, Such As Neurotransmitters And Endocrine Activity, Can.
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The Sa Node Is One Of The Most Important Tissues In The Body As It Initiates Every Heartbeat.
Each contraction of the ventricles is 1 heartbeat.
When Cells Return To Normal It's Called Repolarization, And The Process Is Repeated With Every Heartbeat.
Like all muscle, the heart needs a source of energy and oxygen to function.
The Individual Cells In A Heart Actually Can Beat On Their Own Without Any Nervous Stimulus.