term1 Definition1term2 Definition2term3 Definition3
Please sign in to your Google account to access your documents:
What is diffusion?
net movement of particles from an area of higher concentration to an area of lower concentration down a concentration gradient through a semi-permeable membrane. (passive - requires no energy)
What are 2 examples of diffusion in the human body?
- oxygen in blood from lungs
- nutrients in intestine to blood capillaries
What is osmosis?
net movement of water molecules from an area of higher concentration to an area of lower concentration down a concentration gradient through a semi-permeable membrane. (passive - requires no energy)
What is active transport?
active transport uses energy to pump ions against the concentration gradient. requires energy
How does temperature affect diffusion?
At higher temperatures molecules have more kinetic energy and somove and diffuse faster.
How does pressure affect diffusion?
Molecules move quickly from an area of higher to lower pressure.
How does concentration affect diffusion?
The greater the concentration gradient the greater the diffusionrate.
Need help typing ? See our FAQ (opens in new window)
Please sign in to create this set. We'll bring you back here when you are done.
Discard Changes Sign in
Please sign in to add to folders.
Sign in
Don't have an account? Sign Up »
You have created 2 folders. Please upgrade to Cram Premium to create hundreds of folders!