Circulation in Cells

Cell Membrane

- Allows entry and exit of materials.

Channel Protein

Cell

Membrane

Lipid

Outside of Cell

Inside of Cell

Marker Protein

ReceptorProtein

Carbohydrate chain

Cells move substances through the cell membrane

by a process called transportTwo Types of Transport:

Passive Transport

Active Transport

What is Passive Transport?

Requires no energy from cell.

Molecules move from high concentration to low concentration.

Molecules move with the concentration gradient.

What’s happening?

How would diffusion happen in a cell?

Osmosis is a type of diffusion.

Cell Membrane

HELP WANTED!

I’m a Channel, I can help!

Explain what is happening.

How is Active Transport different?

1. Active transport requires energy.

2. Molecules move from low concentration to high concentration

3. Molecules move against concentration gradient.

Types of Transport- Passive transport

- Diffusion – molecules from high to low- http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/

animation__how_diffusion_works.html

- Osmosis – water from high to low- http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/

animation__how_osmosis_works.html

- Active transport- http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/

animation__how_facilitated_diffusion_works.html

- Endocytosis – taking in- Phagocytosis – solids- http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/

animation__phagocytosis.html

- Pinocytosis - liquids- Exocytosis

- Removal off