We've now looked at three ways in which substances can be transported across cell membranes: diffusion, osmosis, and active transport. Today's topic is an example of where diffusion takes place in the human body, all with the purpose of taking in oxygen for respiration and removing carbon dioxide. There's quite a lot of information today... Continue Reading →
Diffusion – Exchange and Transport Ep 2
Diffusion is one of those topics that pops up at all levels of biology, and each time gets a little more complicated. But it is still the basic process of substances evenly distributing themselves. It is just a little more complex when it happens across a cell membrane. Simple diffusion Firstly, let's recap the basics... Continue Reading →
