the LIP

[BA22]

Chocadude and mel, are right


/offstudydesign - biology

In relation to lacate in the human body, at rest lactate is converted to pyruvate in the standard pathway. As the rate of lactate produciton would be relatively constant (albeit low), so to would its conversion to pyruvate.

Therefore the levels of lactate in the blood would be relatively constant

[mtwtfss]

Thank you BA22!

It doesn't really matter too much, but LIP, and all things energy systems are intriguing.

[BA22]

yeh, we've been over them again this year, but in more detail

We also had lectures on how alcohol affects energy systems, som pretty interesting stuff

[cafa]

i think mel summed it up the best there
ah well thers probs only gunna b 1 question on the exam neway
and also who needs lectures on the effects of alcohol on the energy systems when u can get drunk n see how far home u can run b4 u give up, my results suggest not very far;)

[bridgethuss]

just throwing it out there.. i hate my pe textbook....damn you live it up...!!!

[ash_dhs]

There was actually a clarification of the LIP by VCAA
they basically said that it reflects the balance between lactace entry and removal from the blood
once exceeded, Lactate enters the blood faster than its removed and thus it accumulates at a rapid rate
however, Lactate only begins to accumulate when the anaerobic systems are providing significant amounts of ATP, thus i would believe the LA system is significantly contributing to energy production unless the PC system has had adequate time to recover, with the aerobic system still dominant
the main point to note though is the balance
well that was my understanding and i hope it helped
ne suggestions or if im wrong, please let me know

[akkxn]

There was actually a clarification of the LIP by VCAA
they basically said that it reflects the balance between lactace entry and removal from the blood
once exceeded, Lactate enters the blood faster than its removed and thus it accumulates at a rapid rate
however, Lactate only begins to accumulate when the anaerobic systems are providing significant amounts of ATP, thus i would believe the LA system is significantly contributing to energy production unless the PC system has had adequate time to recover, with the aerobic system still dominant
the main point to note though is the balance
well that was my understanding and i hope it helped
ne suggestions or if im wrong, please let me know

In Malpeli's "Notes" cram book, the definition of LIP is "the point at which the appearance of lactate in the blood accumulates faster than its removal"

I feel like the vcaa definition is the one to go by, but in your response just make sure you mention that going beyond the LIP results in lactic acid accumulating faster than it can be oxidised.

However, it's still really iffy because if you think about the word Lactate Inflection Point, it kind of implies that the lactate levels "inflect" (accumulate rapidly) at that "point"

argh

[nickj]

^^ and thats not to mention that its also a range of points not 1 in particular

[samwalker333]

could anyone comment on this, In regards to Lactic Acid and Lactate is it true that they do not cause fatigue only impede recovery? Is it right to say that Lactic acid can be used to produce ATP? And is it also right to say that a measure of Lactate in the blood is an indirect measure of fatigue because it is infact the indirect measure of H+ ions the is obtained?

thanks in adavance

[mtwtfss]

could anyone comment on this, In regards to Lactic Acid and Lactate is it true that they do not cause fatigue only impede recovery? Is it right to say that Lactic acid can be used to produce ATP? And is it also right to say that a measure of Lactate in the blood is an indirect measure of fatigue because it is infact the indirect measure of H+ ions the is obtained?

thanks in adavance

I would say Lactic Acid and lactate indirectly fatigue... because H+ ions are directly linked to LA and lactate...

Lactic Acid can be used to produce ATP as well as ATP 'supplies' e.g. glycogen, when there is sufficient oxygen available.

Last point is correct.