Submitted by: Submitted by jrphilli
Views: 10
Words: 378
Pages: 2
Category: Science and Technology
Date Submitted: 04/18/2016 07:37 PM
1. What happened to the R-R interval and the heart rate after exercise?
Increase of HR results in a decrease in the R-R interval.
2. The R-R interval consists of the sum of QRS, S-T, T-P and P-R. Which of these became shorter when the heart rate increased?
Most of this shortening occurs in the TP interval. The QT interval also shortens, but only slightly. Overall intervals shortens as the heart rate increases.|T-P interval (time between T waves are closer together)
3. Immediately after exercise, was the amplitude of the pulse smaller or larger than in the resting record?
It was much larger. |Much larger
4. What happened to the pulse amplitude during recovery from exercise?
Decreased significantly
5. During exercise, blood flow in the skin and finger pulp is usually reduced by sympathetic vasoconstrictor nerve activity. After exercise, however, skin and finger blood flow may be increased. Why is the blood flow to extremities reduced during exercise? Why does it increase to higher than normal levels during recovery? What other factors may influence the supply of blood to the skin and fingers during and after exercise?
This is because most oxygen enriched blood would be used by the muscles during exercise that’s why blood flow to skin is reduces and instead taken closer to
6. Changes in the cardiovascular system are only some of a number of changes that occur in the body during and after exercise. What other physical changes did you observe in the volunteer?
7. Immediately after hand exercise, was the amplitude of the pulse smaller or larger than in the resting record?
8. What happened to the pulse amplitude during recovery from hand exercise?
9. The muscles active during hand exercise are mainly in the forearm, with a few small muscles in the hand. Would you expect blood flow to these muscles to increase during exercise?
Yes
10. There are no muscles in the distal segment of the fingers. Would you expect the increased muscle blood flow in exercise to...