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Diastole
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The terms systole and diastole refer respectively to the?
contraction phase and relaxation phase of the ventricles
During the isovolumetric relaxation phase of the cardiac cycle the AV valves are and the semilunar valves are?
closed and closed
From which muscle does the heartbeat originate?
The heartbeat is caused by the contraction and relaxation of the heart muscle. The heart muscle is a special kind of muscle known as cardiac muscle, which is unique as it is both striated (strong), can work without tiring, and cannot be controlled (the movement of the muscle is automatic).
Why is it only possible to induce an extrasystole during relaxation?
The cardiac muscle is incapable of reacting to any stimulus before approximately in the middle of phase 3. It will not react to a normal cardiac stimulus before phase 4.
What is the first phase of mitosis called?
The first phase of itosis is called prophase.
What are the phases of the human heartbeat called this is a medical question?
The human heartbeat has two phases. The systolic phase corresponds with contraction, and the diastolic phase with relaxation.
What is the alternating relaxation and contraction of the heart called?
Diastole is the relaxation phase. Systole is the contraction phase. If you put these phases together you have the Cardiac Cycle...
What is the term that defines the relaxation phase of the heartbeat?
diastole
Is the contraction phase of the heartbeat?
It is called Systole.
What is the contractive phase of heartbeat?
systole
Which phase of the heartbeat does the heart fill with blood?
during diastolic phase the chambers of heart get filled with blood systolic phase and diastolic phase are the phases oh heartbeat and diastolic phase is also known as resting phase.
What is second stimulus before relaxation causes increased force called?
Contraction phase
When preforming CPR what is known as the relaxation phase of the heart?
The relaxation phase of the heart is when there is no compression pressure on the heart.
Define the two phases of the heartbeat?
Diastole (relaxation) Systole (contraction)
Which phase of a muscle twitch is eliminated in complete tetanus?
relaxation phase
How do diastolic and systolic phases of the heart differ?
Diastole is the relaxation of the cardiac muscles after having contracted and pumped out the blood into the arteries.Systole is the contraction of the ventricles of the heart which pushes the blood out of the heart.
The terms systole and diastole refer respectively to the?
contraction phase and relaxation phase of the ventricles
