Download Change in heart rate after prolong times of exercise. PARTNER ONE

Name ______________________________ Name ______________________________
Circulatory System and Respiratory System: Work in Harmony
The circulatory system functions to deliver oxygen and nutrients to tissues for growth and metabolism and to remove
wastes. The heart pumps blood through a circuit that includes arteries, capillaries, and veins. One important circuit is the
pulmonary circuit where there is an exchange of gases within the alveoli of the lung. The right side of the human heart
receives deoxygenated blood from body tissues and pumps it to the lungs. The left side of the heart receives oxygenated
blood from the lungs and pumps it to the tissues.
With increased exercise several changes occur within the circulatory system to increase the delivery of oxygen to actively
respiring muscle cells. These changes include heart rate, increases blood flow to muscular tissue, decreased blood flow to
nonmuscular tissue, increased arterial pressure, increased body temperature, and increased breathing rate.
1. Why does your heart beat faster when you begin exercising?
2. After blood that is oxygenated from the lungs gets to the heart, where does the heart pump this oxygenated blood?
3. Where does deoxygenated blood that is delivered to the heart get pumped to next?
4. Why?
Part One: Compare your resting heart rate and your heart rate after exercise.
1. Resting Heart Rate
a. Find your pulse on the side of your neck or on the radius side of your wrist.
b. Count how many beats your heart makes in 20 seconds (your partner can keep the time).
c. Multiply this number by 3 to get the beats per minute.
d. Repeat a-c twice and take an average.
Average Resting Heart Rate Partner 1: ________ Average Resting Heart Rate Partner 2: ________
2. Now try the easy exercise that was instructed to you by your teacher
Immediately after the exercisea. Find your pulse on the side of your neck or on the radius side of your wrist.
b. Count how many beats your heart makes in 20 seconds (your partner can keep the time).
c. Multiply this number by 3 to get the beats per minute.
d. Repeat a-c twice and take an average.
Average Heart Rate Partner 1: ________ Average Heart Rate Partner 2: ________
3. Now try the strenuous exercise that was instructed to you by your teacher
Immediately after the exercisee. Find your pulse on the side of your neck or on the radius side of your wrist.
f. Count how many beats your heart makes in 20 seconds (your partner can keep the time).
g. Multiply this number by 3 to get the beats per minute.
h. Repeat a-c twice and take an average.
Average Heart Rate Partner 1: ________ Average Heart Rate Partner 2: ________
Part 3: Graph Your Data from Part 1 into the appropriate graph in a way that is easy to compare the three heart
rates.
Change in heart rate after prolong times of exercise. PARTNER ONE
Change in heart rate after prolong times of exercise. PARTNER TWO
Analysis Questions
1. After strenuous exercise, whose heart rate when up the most (You will need to do some math here)?
2. Why do you think this person’s heart rate went up faster than the other person?
3. Your heart is a muscle. Do you think someone who is in very good condition (strong heart) has a higher
resting heart rate or lower? Why?
4. Your heart is a muscle, why is it important to work out this muscle? What kind of exercises work out
this muscle the most?
5. Define homeostasis:
____________________________________________________________________________________
How does your circulatory system help maintain homeostasis?