Quake3World

anybody want to guess what the hell they're trying to tell me?

We've learned about this in the last bio class, I think its ions entering and leaving a cell. 3 Na+ for 2 K+... I wasn't really listening.

Sort of, it's a trying to illustrate the movement of ions in a neuron during action potential. The shitty looking things with "ATP" on them are sodium/potassium pumps, which are moving 2K in for every 3 Na out, while the K+ and Na+ follow their natural chemical and electrical gradients.

But if you're you, how can anybody be expected to figure that out.

I think they're trying to tell you to switch course

I'll be happy to help - it looks like you're looking at a sodium/potassium antiporter.
The hydrolysis of ATP drives the whole thing.
What level do you need an explanation at? Just transport across a membrane, or are you looking at the sodium/potassium thing in particular?

edit - see now that you mentioned action potential and neurons.

Let me know if you still need an explanation about the whole thing.

And that is one ugly looking diagram about the whole thing IMHO.

ToxicBug wrote:We've learned about this in the last bio class, I think its ions entering and leaving a cell. 3 Na+ for 2 K+... I wasn't really listening.

You think? You didn't "think" a thing. You looked at a picture, saw a 3 by the Na and a 2 by the K, saw some arrows, and restated what the pic shows. Unfortunately, too many teens think that this kind of stuff represents some form of an answer.

tnf wrote:I'll be happy to help - it looks like you're looking at a sodium/potassium antiporter.
The hydrolysis of ATP drives the whole thing.
What level do you need an explanation at? Just transport across a membrane, or are you looking at the sodium/potassium thing in particular?

edit - see now that you mentioned action potential and neurons.

Let me know if you still need an explanation about the whole thing.

And that is one ugly looking diagram about the whole thing IMHO.

I think I understand it reasonably well, we have a midterm on monday and I'm just going over the powerpoint lectures.

Want to explain the difference of the movements of Na+ and K+ between resting, graded, and action potential?

The teacher in me is going to ask you to explain it to me first. Seriously, though, I do find it more effective to do that, because then we can address any misconceptions (but I'm guessing you've got the whole thing pretty much figured out).

For now, I'll leave you with this. It looks like there are 3 sodiums going out and 2 potassiums coming in.

I will explain it tomorrow, though. Going to be now and this will require me to dust off my knowledge bank. I think Canis works with neurons...he'd probably be a good resource. Werdheld too.

In fact, they should handle all biology related questions on these forums.

I'll address golfing questions.

Yeah cheers. I should have no problem with this 100 question test on the anatomy and the physiology of our entire nervous system, because 3 sodiums are going out, and 2 potassiums are coming in

your teacher seems to be fond of MSpaint. gg.

rofl..kids still in school learning how to use their 11 fingers..good times

menkent wrote:your teacher seems to be fond of MSpaint. gg.

no way

ToxicBug wrote:We've learned about this in the last bio class, I think its ions entering and leaving a cell. 3 Na+ for 2 K+... I wasn't really listening.

you kinda figured someone on the internet could do the homework for you anyways, huh?