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Chapter: 2 / Q: 65
When heart rate is 75 bpm, the duration of absolute refractory period of cardiac muscle is normally approximately
Chapter: 2 / Q: 66
When heart rate is about 75 beats/min, the duration of ventricular systole is about
Chapter: 2 / Q: 67
Regarding the ionic basis of action potential i n working cardiomyocytes, which of the following is incorrect
Chapter: 2 / Q: 68
The shortest phase of the action potential in ventricular cardiomyocytes is
Chapter: 2 / Q: 69
Which of the following characteristics is unique to skeletal muscle and is not observed in normal cardiac muscle?
Chapter: 2 / Q: 70
Which of the following accelerates contraction as well as relaxation of heart muscle
Chapter: 2 / Q: 71
Under basal conditions, which is the predominant energy substrate utilized by cardiac muscle
Chapter: 2 / Q: 72
Which of the following is not a step in vascular smooth muscle contraction
Chapter: 2 / Q: 73
Resting membrane potential is most unstable in which of the following muscles
Chapter: 2 / Q: 74
The addition of which of the following to a preparation of intestinal smooth muscle would most likely increase the frequency of spike potentials in vitro
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