6 Questions
What is the main factor determining the duration of contraction in cardiac muscle?
Duration of the action potential
Where is the sinus node located?
In the right atrium
What is the function of the A-V bundle in the heart's conduction system?
Conducting the action potential from atria to ventricles
How long does it take for the cardiac impulse to pass from the atria into the ventricles?
Less than 0.1 second
What initiates each cardiac cycle?
Spontaneous generation of an action potential in the sinus node
What is the significance of the plateau phase in cardiac muscle contraction?
Determining duration of contraction
Learn about the duration of contraction in cardiac muscle, which is influenced by the duration of the action potential. Understand the differences in contraction duration between atrial and ventricular muscles during the cardiac cycle.
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