Life Cycle  Human Biology (4B)

PROBLEM: Is the pulse rate the same for boys and girls?PREDICTION:
EXERCISE 1. Find an artery close to the surface of your body (either wrist or neck). Count your pulse for 15 seconds. Have your partner keep watch of the time while you count. Add the number four times (or multiply by four). This will record your pulse rate per minute.
My pulse rate: trial l ______ X 4 = _____ beats per minute
(15 second trial) trial 2 ______ X 4 = _____ beats per minute
trial 3 ______ X 4 = _____ beats per minute
sum of trials ________ Average pulse rate (sum of trials divided by 3) = _______
How does your rate compare with your partner's? ________________________ After running in place for one minute, my pulse rate is:____________ beats per minute EXERCISE II. Let's look at the class average and see if there is a difference between the girls' and boys' pulse rate.
STANDING STILL: girls 
STANDING STILL: boys 
RUNNING: girls 
RUNNING: boys 


AVERAGE:_____ 
AVERAGE:_____ 
AVERAGE:____ 
AVERAGE:____ 
Find the average: add up all the pulse rates under each section and then divide by the number of people in that section.
CONCLUSION: What did we determine in this experiment?