PE Exam '08

[akkxn]

I've heard that the lactic in lactic acid refers to "lactate" and the acid refers to the "hydrogen ions"

im pretty sure Lactic acid is only found in the muscles and lactate is lactic acid in the blood

So when lactic acid is moved from the muscles into the blood, it is separated into lactate and hydrogen ions. Any idea?

Lactic Acid definitely breaks down into Lactate and H+ so doubt you will get the mark for H+.

In regard to question 9 Im pretty sure i answered D (Duration Intensity Maintenance) and although now A seems like the obvious choice and im pissed off at myself is D not also correct seeing maintenance is training at least 2 times per week as is in the training program? Can someone either confirm or tell me why im wrong? Cheers

It would be a legit answer i spose. But I think they're looking for the recognised training principles: SIDOF

[bucket]

I don't think hydrogen ions will be accepted.
I wrote inorganic phosphates and ATP depletion.

as if it wont they are completely different lacic acid is a positive thing that can be used in for energy. H+ ions are what causes that fatigue they are completely separte things although they do accumulate at the same time and rate.

Lol are you an idiot, the question said two causes of fatigue other than lactic acid. I'm pretty sure this question was testing whether people knew why lactic acid brings about fatigue, which is the accumulation of the H⁺ as a by-product which would mean putting that as an answer would be incorrect.

edit*

im pretty sure Lactic acid is only found in the muscles and lactate is lactic acid in the blood

Lactate is a salt formed in lactic acid (hence the name) which means that what you said makes no fucking sense at all. Again, you fail.

[juzzyfizzle]

akkxn - Jordan Berry?

Ahhh no.

[mtwtfss]

But lactic acid itself is not a fatiguing by-product, it does nothing.
It gets broken down some how into the two components H+ ions and lactate, and thats when H+ ions accumulate and fatigue.

I thought lactic acid is a positive thing, as when there is extra oxygen available it can be broken down into ATP 'supplies' via the cori cycle.

[michaelc8]

hmm, from what ive been tought, intensity, type, duration and frequency are all dimensions of physical activity. things like overloading, retraining, diminishing returns, specifity are all training principles so it couldnt be A or D and it couldnt be B because you overload automatically in an aerobic training program.

[jakeburn]

I don't think hydrogen ions will be accepted.
I wrote inorganic phosphates and ATP depletion.

i think your wrong it says in the nelson book that lactic acid accumulation was a good indicator of fatigue but did not cause it if lactic acid didnt cause it that how can hydrogen ions and lactic acid be the same when it keeps saying that hydrogen ions are the main cause of fatigue

[jakeburn]

hmm, from what ive been tought, intensity, type, duration and frequency are all dimensions of physical activity. things like overloading, retraining, diminishing returns, specifity are all training principles so it couldnt be A or D and it couldnt be B because you overload automatically in an aerobic training program.

sorry to say this mate but think your wrong
Specificity
Progressive overload
Frequency
Intensity
Duration
Aadaptations

aditional principles include:
detraining
diminishing returns
retraining
ect.

[michaelc8]

yes hydrogen ions is deffinetly a cause of fatigue due to its impact on the actin and myosin creating crossbridges but inorganic phosphates and depletion of atp is also a cause of fatigue so ur both right dont worry. what was the main cause of fatigue though... i said hydrogen ion accumulation too

[michaelc8]

hmm well specificty, overload and variety is in the program so it could be the answer still

[mtwtfss]

Where did everyone place the X on the reverse U arousal graph thingy.

[michaelc8]

i put mine a centimetre and a half left from the mid point

[studyhound]

yeah same, he was under aroused so he was acting energetically, hence, placed X to the left
 

[bucket]

yeahhhh so did i

[mtwtfss]

Hm, didn't understand the question properly when i read it during the exam, argh dammit.

[akkxn]

Hm, didn't understand the question properly when i read it during the exam, argh dammit.

chocked


what were your answers to the question:

Using the information provided on the graph, why is the energy supply at 10 seconds greater than the energy supply at 90 seconds? (2 marks)