FOR WAGGONER’S BIOLOGY 
53 
to one another and to the body surface. Locate the pulse in your 
body, a. at the wrist, h. just in front of the ear, and c. below the 
angle of the jaw. What is the pulse? 
EXERCISE 56 
THE EFFECT OF EXERCISE UPON THE PULSE RATE 
I. Sit quietly for a time. Locate the pulse in the wrist or in the 
neck. Count the pulsations. Note the number in one minute. 
Record and average these as suggested below. 
II. Stand erect. Count the pulsations as in Part I. Record. 
Is it a matter of effort to stand? Locate the main muscles which 
are involved. What differences are evident between the results in 
Part I and those in Part II? Explain the cause of these. 
III. Rise and extend the arms above the head. Sit. Repeat in 
an energetic manner for a number of times. While still standing, 
count the pulsations as in the preceding exercises. Record and 
average as in Parts I and II. What happens with regard to the 
breathing rate? What is the effect of exercise upon the heart 
beat? Explain the differences between the results obtained in 
this part and those obtained in I and II. 
IV. What is the effect of exercise upon the pulse rate? Why 
does the treatment of a disease of the heart usually call for 
inactivity on the part of a patient? 
Tabular form to be used in recording results: 
Number of 
Pupil 
Pulsations per Minute , 
While sitting 
quietly 
While standing 
While 
exercising 
1 
2 
3 
4 
5 
Average .... 
