Energy Systems: ATP-PC, Lactic Acid and Aerobic - Worksheets, Questions and Revision

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PE.AP5 Energy Systems: ATP-PC, Lactic Acid and Aerobic

AQA 8582 · Calculators not allowed · about 50 minutes
Total Marks
Name: _______________________________    Date: ____ / ____ / ______
Answer ALL questions. Show all your working.
1
Which term describes exercise that can be sustained because the body is able to supply working muscles with enough oxygen to produce energy?
  • A) Anaerobic exercise
  • B) Aerobic exercise
  • C) Isometric exercise
  • D) Ballistic exercise
(Total for Question 1 is 1 mark)
2
Exercise can be classified as aerobic or anaerobic depending on whether oxygen is used to produce energy.
(a)State what is meant by the term 'aerobic exercise'.(1)
(b)State what is meant by the term 'anaerobic exercise'.(1)
(Total for Question 2 is 2 marks)
3
The body uses three energy systems to produce ATP for muscle contraction, each suited to different intensities and durations of exercise.
(a)Name the energy system that provides energy immediately for very short, maximal-intensity efforts.(1)
(b)Name the energy system that provides energy for high-intensity exercise lasting up to a few minutes, producing lactic acid as a by-product.(1)
(c)Name the energy system that provides energy for long-duration, lower-intensity exercise using oxygen.(1)
(Total for Question 3 is 3 marks)
4
State the fuel used, and the by-product (if any), of the ATP-PC system.
(Total for Question 4 is 2 marks)
5
State the fuel used, and the main by-product, of the lactic acid system.
(Total for Question 5 is 2 marks)
6
State the fuels used, and the by-products, of the aerobic system.
(Total for Question 6 is 2 marks)
7
A sprinter explodes out of the blocks and completes a 100 m race in around 10 seconds, working at maximal intensity throughout.
(a)Name the energy system that provides most of the energy for this race.(1)
(b)Explain why this energy system, rather than the aerobic system, is used for this race.(1)
(Total for Question 7 is 2 marks)
8
An 800 m runner completes their race in around 2 minutes, running at a high but not maximal intensity throughout.
(a)Name the energy system that provides most of the energy for the majority of this race.(1)
(b)Explain why the ATP-PC system alone could not supply the energy needed for the whole race.(1)
(Total for Question 8 is 2 marks)
9
A marathon runner completes a 26.2 mile race in just over 2 hours, running at a steady, sustainable pace throughout.
(a)Name the energy system that provides most of the energy for this race.(1)
(b)Explain why the lactic acid system could not be used to fuel the whole marathon.(1)
(Total for Question 9 is 2 marks)
10
Explain why a build-up of lactic acid in a muscle causes muscle fatigue during high-intensity exercise.
(Total for Question 10 is 2 marks)
11
After a hard 400 m race, a runner continues to breathe heavily and their heart rate stays elevated for several minutes as they recover.
(a)State the term used for the extra oxygen the body consumes during recovery from exercise, above what it would consume at rest.(1)
(b)State one reason why this extra oxygen is needed during recovery.(1)
(Total for Question 11 is 2 marks)
12
A rugby union match lasts 80 minutes and involves a constantly changing mix of walking, jogging, sprinting and maximal-effort tackling or scrummaging.

Explain how a rugby player uses all three energy systems at different points during a match, and evaluate why relying on any single system throughout the whole 80 minutes would not be possible.
(Total for Question 12 is 6 marks)
13
Table 1 gives sporting examples with the main energy system used missing.

Table 1
PartSporting exampleApproximate duration
(a)A golf swingUnder 1 second
(b)A 400 m sprintAround 45-60 seconds
(c)A cross-country running raceOver 20 minutes
(a)Name the main energy system used for the action described in row (a) of Table 1.(1)
(b)Name the main energy system used for the action described in row (b) of Table 1.(1)
(c)Name the main energy system used for the action described in row (c) of Table 1.(1)
(Total for Question 13 is 3 marks)
14
Explain why the ATP-PC system can only supply energy for a very short period of time before the muscle must rely on another energy system.
(Total for Question 14 is 2 marks)
15
A tennis player plays a long rally involving a sprint to the net, followed by a period of standing and light movement while waiting for the next point.
(a)Name the energy system most likely used during the explosive sprint to the net.(1)
(b)Name the energy system most likely used during the light movement between points.(1)
(Total for Question 15 is 2 marks)
16
Which of the following is a by-product of the lactic acid system, but NOT a by-product of the aerobic system?
  • A) Carbon dioxide
  • B) Water
  • C) Lactic acid
  • D) Oxygen
(Total for Question 16 is 1 mark)
17
A 400 m runner starts the race at a fast, near-maximal pace, then has to fight to maintain their speed over the final 100 m as their legs feel heavy.
(a)Name the energy system that dominates in the first few seconds of the race.(1)
(b)Explain why the runner's legs feel heavy in the final part of the race.(2)
(Total for Question 17 is 3 marks)
18
A weightlifter performs a single maximal one-repetition lift, taking only a few seconds. Explain one advantage of the ATP-PC system, rather than the lactic acid system, for this type of effort.
(Total for Question 18 is 2 marks)
19
A boxer trains at high altitude, where the air contains a lower concentration of oxygen than at sea level.
(a)State what happens to the amount of oxygen available to the boxer's working muscles at altitude, compared with at sea level.(1)
(b)Suggest how this might affect how much the aerobic system can contribute during a hard training session, compared with training at sea level.(2)
(Total for Question 19 is 3 marks)
20
The ATP-PC system and the lactic acid system are both anaerobic energy systems, but they differ in other ways.
(a)State one difference between the ATP-PC system and the lactic acid system in terms of the by-product each one produces.(1)
(b)State one difference between the ATP-PC system and the lactic acid system in terms of how long each can supply energy for.(1)
(Total for Question 20 is 2 marks)
21
A hockey player performs repeated 20-30 metre sprints during a match, each followed by a short recovery period of jogging or standing.
(a)Name the energy system that dominates during each individual sprint.(1)
(b)Explain why the recovery periods of jogging or standing between sprints are important for the player's ability to keep sprinting throughout the match.(1)
(Total for Question 21 is 2 marks)
22
A javelin thrower's whole throwing action, from the final stride to the release of the javelin, lasts less than 2 seconds and requires a maximal, explosive effort.
(a)Name the energy system used for this action.(1)
(b)Explain why this energy system is well suited to a single explosive throw like this, but could not fuel an entire training session of repeated throws with only very short rests.(2)
(Total for Question 22 is 3 marks)
Mark scheme · PE.AP5 Energy Systems: ATP-PC, Lactic Acid and Aerobic

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Question 10

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20

Question 21

Question 22