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Questions and Answers
Which region of the heart lacks a clear plateau phase in its action potential?
Which region of the heart lacks a clear plateau phase in its action potential?
- Purkinje fibers
- AV node
- SA node (correct)
- Ventricular myocytes
Which type of cells exhibit automaticity in their action potential?
Which type of cells exhibit automaticity in their action potential?
- Ventricular endocardium
- Purkinje fibers
- SA node (correct)
- AV node
Which region of the heart has a slow Ca-mediated upstroke in its action potential?
Which region of the heart has a slow Ca-mediated upstroke in its action potential?
- SA and AV nodes (correct)
- SA node
- Ventricular myocytes
- Purkinje fibers
What distinguishes the shape of the cardiac action potential when recorded from different regions of the heart?
What distinguishes the shape of the cardiac action potential when recorded from different regions of the heart?
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