Osmosis/Diffusion (Passive transport) Flashcards
According to the kinetic model for matter what state of motion are atoms and molecules in?
constant and random motion
What happens when atoms and molecules are in gases and liquids?
they collide and gradually move away from where they need to be concentrated
What is the name of molecules and atoms that move constantly and randomly away from where they need to be concentrated?
Passive transport
Why do molecules and atoms move constantly and randomly away from where they need to be concentrated?
because it does not involve expenditure of energy
What is diffusion and osmosis?
the passive transport of a substance from high concentration to low concentration until an overall concentration is reached
What is simple diffusion?
when small uncharged molecules continuously exchange across the membrane
What is an example of simple diffusion?
Oxygen, Carbon dioxide