VCE Stuff > VCE Physical Education
ilikeschool's questions
melaniej:
OK, for the first one:
They all have the same oxygen deficit because the oxygen deficit occurs when an athlete works anaerobically. Because the anaerobic systems have a finite capacity, they all use their anaerobic systems for the same duration... does that make sense?
So they all switch over to aerobic once the anaerobic is exhausted, and because they are all sort of middle distance events, they are all likely to switch over to their aerobic system during their event, hence having the same amount of oxygen deficit.
melaniej:
The second question:
more energy is released aerobically than anaerobically is basically because there is oxygen present.
With oxygen present, means that further breakdown of the glucose can occur.
Do you have the answers for that question? I'm not quite sure how much depth you would need to go into for 2 marks.
melaniej:
The third one:
Its an isotonic contraction. I think that might be it.
Further depth its a concentric isotonic contraction because the abdominal muscle is shortening.
As for knowing them for the exam, I think we may need to know the 3 different types
- isometric = no change in muscle length eg pushing against a wall, gripping a tennis racket
- isotonic = change in muscle length, concentric = shortens eg bicep in a bicep curl and eccentric = lengthening e.g. tricep when conducting a bicep curl
- isokinetic = same force throughout the whole movements - can only be done with a machine
I'm pretty sure we do need to know it!
melaniej:
hmm on second thoughts... the answer could be flexion? because it's asking the 'action' of the truck...
but i have no idea!
where are these questions from / do you have the answers?
transgression:
Second question answer: Because the molecule is not fully broken down. The lactic acid produced in anaerobic glycolysis still contains some energy.
Third question answer: Flexion
I thought it was the the types as well (the ones you listed).
Thanks for you help :)
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