W. McConnell 2004 Kinross High School The Body In Action (D) CHANGING LEVELS OF PERFORMANCE.

W. McConnell 2004 Kinross High School

The Body In Action

(D) CHANGING LEVELS OF PERFORMANCE


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.


2. What causes muscle fatigue?

Lactic acid building up in the muscles because they do not have enough oxygen.


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


4. What is the term used to describe the time taken for your heart rate to return to normal after exercise?

Recovery time


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


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


7.When not enough oxygen reaches the muscles anaerobic respiration takes place.

Complete the word equation below for anaerobic respiration.

…………….. ………………… + ….………glucose

lactic acid energy


8.What type of respiration occurs when enough oxygen is taken into break down the food completely to release energy ?

aerobic respiration


9.What effect does training have on recovery time?

Training decreases recovery time


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.


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


12.How is the energy from respiration given off?

In small amounts


13.How is heat energy released from respiration detected?

As a temperature rise


14.What term is used for sore and inefficient muscles after exercising?

Muscle fatigue


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


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W. McConnell 2004 Kinross High School The Body In Action (D) CHANGING LEVELS OF PERFORMANCE.

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