Diffusion & Osmosis - AQA Biology B1

In this video we discuss two very important processes; diffusion and osmosis. We examine the difference between the two (there is one!) and we look at examples to demonstrate each in action.

[tabithawambbui]

Thank you it makes a lot of sense.Well done

[noor_-yybn]

You're honestly a life saver, you deserve so much more recognition! Please can you do more recent Biology Higher exam paper videos - papers from 2016-2017 possibly? My GCSE's are at the start of next year and I found your previous exam papers videos extremely helpful, I could do with the extra practice. Thanks a lot, once again :)

[dannichols]

This is very well done!! You show *good attention to details* ! At 0:52 I was getting ready to type here, "...in a fluid!", but then you *added it* ! Good job!
Diffusion: 5:51 -- *net* effect of motion, material still in motion, back & forth. Again, good!
And then at about 14:30, you said what may finally sink in for me: "...until their *water concentrations are equal again* "! I still don't get why the water is higher (how it can be), but I do see that the water *moves* over to the right (as you said earlier, *back & forth* continuously, with net effect of a volume of movement). I see the water *over there*, I just can't (yet) see how it *stays* there. The water *can* move, under the force of its internal heat driving the movement of the molecules everywhere randomly bouncing off one another, so it does. How it 'insists' to do so until the water concentrations are *equal*, whilst *lifting* the water up without external energy, is something I just don't yet get.

[smatenygaming]

I am in year 9 and we are learning this I am in top set and we are talking about hypertonic and hypotonic solutions and it's sooo hard