Hole's Human Anatomy & Physiology (Shier), 12th Edition

Ph.I.L.S. 3.0 Quizzing 25: Ph.I.L.S. 3.0 Quizzing

Ph.I.L.S. 3.0 Quizzing

1
Look at your data. Notice that exercise decreases the R-R interval. Which of the following intervals decreases by a comparable amount?
A)The P-R interval increases substantially.
B)The R-T interval decreases substantially.
C)The T-P interval decreases substantially.
2
If the P-R interval is not changed by exercise, this observation indicates that:
A)exercise does not change the duration of the atrial action potential.
B)exercise does not change the duration of the ventricle action potential.
C)exercise changes the timing between cardiac cycles.
3
If the R-T interval is not changed by exercise, this observation indicates that:
A)exercise does not change the duration of the atrial action potential.
B)exercise does not change the duration of the ventricle action potential.
C)exercise changes the timing between cardiac cycles.
4
If the T-P interval is reduced by exercise, this observation indicates that:
A)exercise does not change the duration of the atrial action potential.
B)exercise does not change the duration of the ventricle action potential.
C)exercise changes the timing between cardiac cycles.
5
If the T-P interval is reduced by exercise, what happens to the time course of coronary blood flow when the heart rate increases during and immediately after exercise?
A)There is a decrease in the duration of the coronary blood flow between cardiac cycles.
B)There is no change in the duration of the coronary blood flow between cardiac cycles.
C)There is an increase in the duration of the coronary blood flow between cardiac cycles.
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