Question

Why does moistness affect the rate/ ease of diffusion?

Answer 1

And while we're at it, potassium and phosphates are needed in plants. Which is for photosynthesis, which for respiration?

Answer 2

And while we're at THAT, in what process do we produce urea? (Apologies, but I'm only allowed 1 open question)

Answer 3

Why does moistness affect the rate/ ease of diffusion
bascially it decrese resistance to flow. suppose if you mix somthing in solid form it will not mix uniformly but if you use water then it will mix.

Answer 4

Would it be correct to say that the water's polarisation electrically transports (or moves) the molecules?

Answer 5

For Urea - amino acid catabolism would be the process. If you imagine your basic amino acid structure, the section without the amine group can be reused to make compounds (e.g., glucose), the amine group gets converted into ammonia (toxic for humans, so that gets converted to urea).

I can't give you a straight answer for the K+ and phosphates question; however, off the top of my head, I know that K+ is essential to the opening of the stomata (which indirectly affects photosynthesis). Phosphates are parts of coenzymes and ATP, ATP being especially important in both processes.

Can't really comment on your third question, though a moist membrane in the alveoli of our lungs is essential to gas diffusion - without it, the lipid membrane would collapse. Gas needs to diffuse first into the moist layer, then through the membrane, and off to the rest of our bodies.

Answer 6

i belive only solubilty is important. If your using polar solvent such as water then it will help for diifusion of molecule which will dissolve in water.