Unit 4- Functional Cell Membrane Flashcards
What is diffusion?
Movement of molecules from high to low concentration
The difference in the concentrations is…
Concentration gradient
The diffusion of water is called…
Osmosis
The diffusion of solutes through transport proteins is…
Facilitated diffusion
Captures substances from outside the cell &’ bring it into cell is called..
Endocytosis
Releases contents to the outside of the cell is called…
Exocytosis
Define semipermeable
Has control over what molecules can enter/leave the cell
What is the energy being used for this movement of materials?
ATP
Why do the particles move?
They have energy
What occurs to this concentration of molecules of given enough time?
Spread out and fill up the space
Less dissolved particles outside of the cell
Hypotonic
Equal amount in &’ out of cell
Isotonic
More dissolved particles outside the cell
Hypertonic
Can any ion flow through any ion channel
No, some are closed off (gated)
Why must special transport proteins be used to transport ions and polar molecules?
Transport proteins control what comes in &’ out
