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The Body In Action

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?.

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The Body In Action

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  1. The Body In Action (D) CHANGING LEVELS OF PERFORMANCE

  2. 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.

  3. 2. What causes muscle fatigue? Lactic acid building up in the muscles because they do not have enough oxygen.

  4. 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 glucose oxygen increases

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

  6. 5. 2 identical twins run a race. Here is information about their pulse rates each minute. • 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

  7. 6. 2 identical twins run a race. Here is information about their fitness. It shows their pulse rates each minute. What is Fred’s recovery time? What is Charles’ recovery time? Why is there a difference between them? 10 minutes We do not know – he has not reached it yet. Fred is fitter

  8. 7. When not enough oxygen reaches the muscles anaerobic respiration takes place. Complete the word equation below for anaerobic respiration. glucose lactic acid energy …………….. ………………… + ….………

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

  10. 9. What effect does training have on recovery time? Training decreases recovery time

  11. 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.

  12. 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 exercise false true false true

  13. 12. How is the energy from respiration given off? In small amounts

  14. 13. How is heat energy released from respiration detected? As a temperature rise

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

  16. 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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