Transport between cells Flashcards
1
Q
What are the three main transport methods
A
Osmosis, Diffusion, Active transport
2
Q
What is diffusion
A
Net movement of particles down a concentration gradient; from high to low concentration
3
Q
What kind of transport is diffusion and why
A
Passive transport as no metabolic energy is expended
4
Q
An example of diffusionm
A
Exchange across respiratory surfaces, such as lungs
5
Q
What is facilitated diffusion for
A
large and or hydrophilic particles need to cross the cell membrane
6
Q
How do some particles such as ions diffuse?
A
Through channel proteins
7
Q
What are gated channel proteins
A
channel proteins that can open or close in response to a specific messenger or change in voltage across the membrane
