Which of the following is true of the cardiac action potential? - The cardiac action potential is
longer than the skeletal muscle action potential.
Which of the following is true of the cardiac action potential? - The cardiac action potential is
longer than the skeletal muscle action potential.
...
PhysioEX Chapter 6 exercise 1
Which of the following is true of the cardiac action potential? - The cardiac action potential is
longer than the skeletal muscle action potential.
Which of the following is true of the cardiac action potential? - The cardiac action potential is
longer than the skeletal muscle action potential.
The cardiac muscle is capable of which of the following? - autorhythmicity
Phase 2 of the cardiac action potential, when the calcium channels remain open and potassium channels
are closed, is
called the - plateau phase
The amplitude of the ventricular systole did not change with the more frequent stimulation because -
a new contraction could not begin until the relaxation phase
Which of the following do you think contribute to the inability of cardiac muscle to be tetanized? -
the long refractory period of the cardiac action potential
Given the function of the heart, why is it important that cardiac muscle cannot reach tetanus? -
The ventricles must contract and relax fully with each beat to pump blood.
An extrasystole corresponds to - an extra ventricular contraction.
Which of the following is true of the cardiac action potential? - The cardiac action potential is
longer than the skeletal muscle action potential.
If you deliver multiple stimuli (20 stimuli per second) to the heart, what do you think will happen? -
neither wave summation nor tetanus
Which of the following statements about the contractile activity is true? - The smaller waves
represent the contraction of the atria
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