volume area to surface ratio

[hard]

Can someone please explain that cause i didn't do units 1/2?

[NE2000]

Same as in chem

Greater surface area : volume ratio means a reaction can occur faster because the reagents can be in contact more of the time. If you have two big sphere balls and put them together, they are only in contact at the surface and on the inside the reaction can't occur. This means a slow rate of reaction. If you chop them up into tiny pieces and then put them together then you'll get the collisions happening faster.

In a biological context, if you had a few huge cells, then less surface area is exposed to the blood leading to a lower rate of diffusion into the cell. If you had a million small cells, a greater surface area is exposed to blood and tissue fluid meaning that you have more surface for such transportation to occur.

[hard]

ahh yer thanks again

[/0]

The higher the surface area to volume ratio is, the greater the number molecules which can pass through the semi-permeable membranes into and out of the cell. This why most protists you see are flat, increasing their surface area to allow molecules in and out. Also, the lining of our alveoli is very convoluted, giving greater surface area and greater diffusion of oxygen molecules. Importantly, water can only diffuse a few mm through a cell, so if the cell is too thick then the nucleus might not receive the vital water.
However, it can also pose problems: it is harder to control body temperature, and it is easier to lose nutrients and water.

[hard]

The higher the surface area to volume ratio is, the greater the number molecules which can pass through the semi-permeable membranes into and out of the cell. This why most protists you see are flat, increasing their surface area to allow molecules in and out. Also, the lining of our alveoli is very convoluted, giving greater surface area and greater diffusion of oxygen molecules. Importantly, water can only diffuse a few mm through a cell, so if the cell is too thick then the nucleus might not receive the vital water.
However, it can also pose problems: it is harder to control body temperature, and it is easier to lose nutrients and water.

how do you know this without doing bio?
btw nice summary.

[/0]

I did unit 1 bio

[hard]

oh nice. 

[jackinthepatch]

I did unit 1 bio

Why'd you drop it out of curiousity?

[/0]

I was doing 7 subjects and cbf anymore

[jackinthepatch]

Ohh shit I'd get out too if I was doing 7 subjects lol.

[TrueTears]

/0 was so pro at bio btw lol

[jackinthepatch]

Lol I'm sure he was, he seems to be good as with his other subjects. Did he do a 3/4 last year? I bet he dominated it lol.

[hard]

methods = 48

[hard]

Lol I'm sure he was, he seems to be good as with his other subjects. Did he do a 3/4 last year? I bet he dominated it lol.

btw what ya up to in bio jack?

[jackinthepatch]

methods = 48

Yeah that's fair good lol.

btw what ya up to in bio jack?

Umm well in class we're up to the structure of proteins (you know, primary structure, secondary structure, so on). But during the holidays I was reading the textbook and got so involved that I ended up reading all of AOS1 lol. I dunno why, I just enjoyed what I was reading, so I just kept going lol. What about you man?