The highest autorhythmicity part is []
A. Sinus node
B. Atrial muscle
C. Atrioventricular junction
D. Peripheral Purkinje fibers
E. Atrioventricular bundle
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The action potential plateau of ventricular myocytes is the comprehensive result of which ions flow across the membrane []
A. Sodium ion influx, chloride ion outflow
B. Sodium ion influx, potassium ion outflow
C. Sodium ion influx, chloride ion inflow
D. Calcium ion influx, potassium ion outflow
E. Potassium ion outflow, calcium ion outflow
What can reflect the process of left and right atrium depolarization is []
A. P wave
B. QRS complex
C. T wave
D. P-R interval
E. ST segment
The fastest conducting site in the heart is []
A. Sinus node
B. Atrial muscle
C. Atrioventricular junction
D. Purkinje fiber
E. Ventricular muscle
The percentage of stroke output in which of the following volumes, called ejection fraction? []
A. returned blood volume
B. cardiac output per minute
C. Isovolumic diastolic volume
D. End-systolic volume
End-diastolic volume
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