What does it mean to travel down a concentration gradient? Would it take longer for a...

What does it mean to travel down a concentration gradient? Would it take longer for a cell to get oxygen to the middle of the cell via diffusion if it had a higher or lower surface area? Why?

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Ans. A concentration gradient occurs when the concentration of particles is higher in one area than another . In passive transport , particles will diffuse down a concentration gradient , from areas of high concentration to areas of lower concentrations until they are evenly spaced.

When a cells surface area increase , the amount of substances diffusing into the cell increases. As volume and surface area increase , the volume increases faster , so much so that surface area available to allow substances in halves each time the cell volume doubles. A cell will eventually became so large there is not enough surface area to allow diffusion of sufficient substance like O2 and it will die .

Multicellular organism have developed internal gas exchange organ ( lungs) in order to provide an increased surface area . With the lungs far away from other body cell , circulatory system has also developed in order to provide all cells oxygen . .

But in case smaller cells more efficient at diffusing material through the cell membrane and into the cell . Because the surface area - to- volume ratio is larger in smaller cell , means stuff passes in and out of a small cell quickly & efficiently .

gladiator answered 1 year ago

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What does it mean to travel down a concentration gradient? Would it take longer for a...

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