Short, simple animations demonstrating facilitated diffusion with a channel protein and with carrier proteins – three types: uniport, symport, & antiport (from St Olaf).
An animated, narrated tutorial on the three types of carrier proteins(from Sinauer Associates).
A short, simple animation demonstrating osmosis (from St Olaf) or here are two fantastic animated, narrated tutorials from McGraw Hill Education – osmosis & how osmosis works.
ACTIVE TRANSPORT
A short, simple animation demonstrating Secondary Active Transport– the Na/K pump coupled with the glucose/Na symport (from St Olaf).
ENDOCYTOSIS & EXOCYTOSIS
A short, simple animation demonstrating phagocytosis(from St Olaf) or here is a fantastic animated, narrated tutorial from McGraw Hill Education – Endocytosis & Exocytosis– which includes a quiz.
And here is an animated, narrated tutorial on vesicle budding & fusing which also includes a quiz (from Sinauer Associates).
Here Paul Andersen gives you a brief introduction to The Cell Membrane.
In Crash Course Biology #5 – In Da Club – Membranes & Transport, Hank describes how cells regulate their contents and communicate with one another via mechanisms within the cell membrane.
GCSE Bitesize –Cell Activity– covers animal & plant cells, movement in & out of cells & cell division (18m). Science in Focus –Cell Biology – a 19m video.
For self-assessment questions, with exercises and discussions, just click on the correct topic at Biology GCSE & IGCSE Question Bank. Powerpoints can be downloaded from the same sitehere.The s-cool revision sitelets you revise the topic, summarizes the topic & tests you on it. Skooolgives you a lesson, including progress questions, for each Biology topic but you’ll need sound on for it.
Some information on solids, liquids and gases (including a decent animation) can be found here. And this is a video on States of Matter from The Virtual School:
Science Bank 4 (Motion of Particles): Part 1 – Brownian motion (to 4m 45s); Part 2 – diffusion (to 9m 45s); Part 3 – changes of state (to 14m 15s):