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W. McConnell 2004 Kinross High School
The Body In Action
(D) CHANGING LEVELS OF PERFORMANCE
W. McConnell 2004 Kinross High School
1. What causes the pulse you feel in the blood vessel in your wrist?
Blood being forced through an artery each time the heart beats.
W. McConnell 2004 Kinross High School
2. What causes muscle fatigue?
Lactic acid building up in the muscles because they do not have enough oxygen.
W. McConnell 2004 Kinross High School
3.
Pulse rate and breathing rate ………. after exercise.
This is because muscles need more …………. and ..……
Heart rate ………….. to
increase the blood flow
to the muscles.
increase
oxygen
glucose
increases
W. McConnell 2004 Kinross High School
4. What is the term used to describe the time taken for your heart rate to return to normal after exercise?
Recovery time
W. McConnell 2004 Kinross High School
5. 2 identical twins run a race. Here is information about their pulse rates each minute.
Time in
mins0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Fred 55 55 57 150 160 165 179 170 100 85 80 75 70 67 63 57 56 55 55 55 55
Charles 70 70 70 160 170 175 178 180 140 110 105 95 90 87 85 82 80 82 80 80 78
Getting
readyDoing press ups Finish press ups - sit down and rest
•What is Fred’s resting pulse rate?
•How many minutes after the end of the race did it take for Fred’s pulse rate to return to normal?
55 beats a minute
10 minutes
W. McConnell 2004 Kinross High School
6. 2 identical twins run a race. Here is information about their fitness. It shows their pulse rates each minute.
Time in
mins0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Fred 55 55 57 150 160 165 179 170 100 85 80 75 70 67 63 57 56 55 55 55 55
Charles 70 70 70 160 170 175 178 180 140 110 105 95 90 87 85 82 80 82 80 80 78
Getting
readyDoing press ups Finish press ups - sit down and rest
What is Fred’s recovery time?
What is Charles’ recovery time?
Why is there a difference between them?
10 minutesWe do not know – he has not reached it yet.
Fred is fitter
W. McConnell 2004 Kinross High School
7.When not enough oxygen reaches the muscles anaerobic respiration takes place.
Complete the word equation below for anaerobic respiration.
…………….. ………………… + ….………glucose
lactic acid energy
W. McConnell 2004 Kinross High School
8.What type of respiration occurs when enough oxygen is taken into break down the food completely to release energy ?
aerobic respiration
W. McConnell 2004 Kinross High School
9.What effect does training have on recovery time?
Training decreases recovery time
W. McConnell 2004 Kinross High School
10.What can we use as a measure of how quickly we can respond to stimuli from our environment ?
Reaction time – if our reaction time to stimuli is short we can respond quickly to stimuli from our environment.
W. McConnell 2004 Kinross High School
11.Answer true or false to the following….
Athletes have a smaller lung volume than non-athletes
Training increases muscle strength and endurance
During exercise lactic acid is used up in the muscles
Everyone’s pulse rate increases during exercisetrue
false
true
false
W. McConnell 2004 Kinross High School
12.How is the energy from respiration given off?
In small amounts
W. McConnell 2004 Kinross High School
13.How is heat energy released from respiration detected?
As a temperature rise
W. McConnell 2004 Kinross High School
14.What term is used for sore and inefficient muscles after exercising?
Muscle fatigue
W. McConnell 2004 Kinross High School
15.What are the 3 ways in which fitness training improves your body’s efficiency?
•Heart pumps more blood every beat
•Increases flow of blood through muscles
•Increases lung volume
W. McConnell 2004 Kinross High School
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