biology
Text z Príbehu
- a form of diffusion that does not require the assistance of membrane protein. Who's ready to go to the cell membrane!
- Osmosis: Only water can travel through channel proteinsimple diffusion: a form of diffusion that does not require the assistance of membrane proteins.facilitated diffusion: a form of diffusion that does not require the assistance of membrane proteins.Active transport:the process of moving molecules across a cellular membrane through the use of cellular energy.
- Please read the board for some info before the field trip
- Welcome to the cell membrane!
- thats crazy!
- Now were inside of one of the channel proteins. Those bubble-like things you see floating around are molecules. The channel protein allows molecules to enter into the cell. This is an example of facilitated diffusion.
- These are phospholipids. They participate in passive transport. In endocytosis, the phospholipids form a vesicle to allow molecules to enter, and vice-versa with exocytosis.
- This is a diagram of concentration gradient. To the left, you can see a high conc. and to the right is a low conc. The cell membrane uses different types of diffusion to allow molecules in. A pump protein is an example of active transport because it uses ATP. It is also selectively permeable, meaning it gets to choose which molecules to let in.