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Physical Education [3/4] Question Thread
anotherworld2b:
thank you so much for your help :D
Yes this response is for a 6 mark question.
Would there be anything else I am missing?
--- Quote from: howey on July 23, 2017, 03:14:53 pm ---Okay, I've gone through and edited/slightly rewritten your response, anotherworld2b (I've tried to leave it in your words as much as possible). I should add that this is a very in-depth response (e.g. a 6 or 8-mark question). Hopefully it all makes sense.
Spoiler The data collected indicated as the amount of exercise increases, heart rate will increase gradually until a max heart rate is reached. At the start of exercise, oxygen deficit would occur as the body's cardiovascular and respiratory systems respond to physical activity. The oxygen deficit from 0 to 100m would be because the anaerobic energy systems are producing the majority of the ATP. Aerobic respiration would be present throughout the entire 400m. At the beginning of exercise (e.g. the first 100m), it would be less dominant as the aerobic energy system takes some time to function at full capacity. In the experiment, the participant’s sudden increase in activity intensity by moving from standing to a steady jog reflected the corresponding initial sharp increase in heart rate shown in the graph from 0-100 metres. As the body’s initial demand for oxygen and nutrients increased significantly at the start of exercise, a sharp increase in heart rate was necessary in order to increase blood flow and stroke volume, which supplies oxygen and nutrients to the muscles and removes waste products.
Initially, anaerobic respiration allows ATP to be produced in the absence of oxygen. This results in the accumulation of lactic acid and other fatigue-causing by-products, such as H+ ions, in the muscles. After the 100m mark, oxygen supply is very close to equalling oxygen demand, as the exercise intensity is constant. Therefore, the athlete's heart rate will remain fairly steady, as they don't need to take in any more oxygen. Heart rate continues to increase slightly as the participant depletes their anaerobic sources of energy and the aerobic energy system becomes more predominant from 200-400m. Heart rate may slightly increase because the athlete hasn’t quite settled into steady state, and there is a slightly greater demand for oxygen than is currently being supplied. This increased heart rate will also allow for fatigue-causing by-products produced by the anaerobic energy systems to be removed.
I'm glad I've been able to help you :)
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howey:
--- Quote from: anotherworld2b on July 23, 2017, 03:49:38 pm ---thank you so much for your help :D
Yes this response is for a 6 mark question.
Would there be anything else I am missing?
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No worries. I don't think there's anything else important that you're missing :)
wri0061:
Hi!!!
What is the difference between aerobic and anaerobic adaptations???
gisele:
--- Quote from: wri0061 on August 02, 2017, 08:03:46 pm ---Hi!!!
What is the difference between aerobic and anaerobic adaptations???
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Aerobic adaptations are adaptations that increase the efficiency of the aerobic system; that is, the adaptations that improve the ability for the body to take up, transport and utilise O2. (things like increase in lung volume, haemoglobin, mitochondria and oxidative enzymes that increase the amount of oxygen that can be used to resynthesise ATP aerobically and increase endurance)
Anaerobic adaptations increase the efficiency of the anaerobic systems; that is, to improve the ability to generate energy in the absence of oxygen (things like increasing glycolytic enzymes, muscle fibre hypertrophy that increase force/speed) :)
wri0061:
--- Quote from: gisele on August 03, 2017, 01:58:38 pm ---Aerobic adaptations are adaptations that increase the efficiency of the aerobic system; that is, the adaptations that improve the ability for the body to take up, transport and utilise O2. (things like increase in lung volume, haemoglobin, mitochondria and oxidative enzymes that increase the amount of oxygen that can be used to resynthesise ATP aerobically and increase endurance)
Anaerobic adaptations increase the efficiency of the anaerobic systems; that is, to improve the ability to generate energy in the absence of oxygen (things like increasing glycolytic enzymes, muscle fibre hypertrophy that increase force/speed) :)
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Thank you so much 🙌🏼 I had my SAC on Friday and got a 76%, pretty happy 😄
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