Feburary PE Exam questions and answers Flashcards
Define expiratory reserve volume.
The amount of air that can be forcibly expired after a normal breath.
Identify 2 functions of the fast component of EPOC.
- Restore phosphocreatine and ATP
2. Resaturate myoglobin
What is the type of joint, main agonist and joint action when holding the crucifix position in gymnastics?
Type of joint- ball and socket
Agonist- deltoid
Joint action- abduction
How does wave summation help a gymnast get extra height?
- Wave summation allows for a more powerful contraction
- The stimuli are sent so frequently that the muscle is stimulated before it even has time to relax
- This means they will have a greater force to propel into the air and get extra height with.
Identify some characteristics of fast twitch glycolytic fibres.
- High fatigue ability
- Lots of PC Stores
- Lots of glycogen stores
- Very quick contraction speed
- Large muscle fibre size
How are the characteristics of fast twitch glycolytic fibres good for producing ATP anaerobically?
If they have lots of PC Stores then they can quickly resynthesize and reproduce ATP to be used in the ATP-PC system anaerobically
If they have lots of glycogen then they can produce energy for resynthesize in the lactic acid system
When relating to energy transfer, evaluate the use of altitude training for a 1500m run.
- Altitude training is when an athlete trains about 5000m above sea level. Because it is so high it helps with the aerobic capacity of an athlete.
- When training at this altitude, more EPO is produced and so there is a greater delivery of oxygen through red blood cells. This is helpful as an average club runner for 1500m will usually use the aerobic system for energy.
- However, for stronger athletes they are more likely to use the lactic acid system as they will only be competing for about 2 minutes and so something like HIT training might be better.
- There are other disadvantages of altitude training because the athlete might experience sickness which means they can’t train and they may also miss home.
- This method would be more helpful for a longer distance runner like a marathon or someone competing in a triathlon of running, cycling and swimming.
Evaluate the contribution of the ATP-PC system.
- The ATP-PC system can only work and last for about 10 seconds.
- An athlete can only use their ATP stores for 2 seconds
- It involves the breakdown of ATP into ADP + P.
- PC stores then use their energy to build ADP back into ATP.
- But you only have enough PC to use the stores for about 8 seconds.
- It then takes about 2-3 minute for the PC stores to be replenished (in the fast component of EPOC).
Evaluate the contribution of the lactic acid system.
- This system lasts for 1-2 minutes.
- This system converts glycogen into glucose. Glycolysis then breaks down glucose.
- From this, enough energy to resynthesize 2 ATP are produced. Pyruvic acid is then also produced.
- However, without oxygen pyruvic acid turns into lactic acid.
- It has a low energy yield as it only produces 2 ATP from 1 molecule of glucose.
- It does produce the energy quickly though.
Evaluate the contribution of the aerobic system.
- Follows the same path as lactic acid system- glycogen-glucose- energy for 2 ATP-pyruvic acid. But with oxygen the pyruvic acid turns into acetyl-co-A and then joins the Kreb’s cycle.
- Carbon dioxide and water are produced.
- Energy for another 2 ATP is produced.
- Hydrogen ions are then produced and this enters the electron transport chain where lots of energy is produced to make 32-34 ATP (so 36-38 in total).
- It takes much more time for this system but it does last for a long time.
- There is a high energy yield from only one glucose molecule.
Would you describe the dive at a start of a swimming race, self-paced or externally paced?
Self paced
Would you describe the dive at a start of a swimming race, simple or complex?
Simple
Define response time.
The time taken from the onset of a stimulus to the end of movement.
What are the functions of the central mechanisms in Whiting’s model?
Perceptual- the athlete interprets all the information in the display and surroundings
Translatory- makes a decision and compares to other past situations depending on the information
Effector- A response is sent for the muscles to react.
What strategies can be used to improve selective attention?
- Make the stimulus more intense- like a brighter colour object
- Train with lots of distractions so the athlete has to learn how to only focus on the important information.
- Look at the opposition you are playing against and try to prempt and anticipate what they will do so you are ready for it.
- Practice with the stimuli for a long time- increase the chances of getting to know the stimuli.