Which event happens at the start of a cardiac cycle?
A) Blood is ejected from the atrium.
B) The SA node fires.
C) The P wave develops.
D) Ventricular systole occurs.
E) Atrial systole occurs.
Correct Answer:
Verified
Q39: The flattening of the action potentials of
Q40: During the plateau phase of the action
Q41: During the isovolumic phase of ventricular systole,
A)
Q42: The QRS complex of an ECG corresponds
Q43: Atrial contraction
A) begins during the first part
Q45: The P wave of an ECG corresponds
Q46: In electrocardiography, a lead is a(n)
A) electrode.
B)
Q47: During the cardiac cycle,
A) the P wave
Q48: The term used to describe the amount
Q49: Ventricular contraction
A) begins during the first part
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