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13 Cards in this Set

  • Front
  • Back
What is osmosis?
the diffusion of water in and out or a cell.
What is diffusion?
the movement of molecules from a higher to a lower concentration.
What is facilitated diffusion?
when molecules diffuse through a membrane by transport proteins NO energy is required high -> low gradient with protein help with movement.
What is active transport?
Requires ATP as molecules move against a gradient.
List the Factors that affect the rate of movement.
Medium that it passes through (gas, liquid, or solid.(f,m,s))
Size of molecules (glycogen= larger=slower)(glucose=smaller =faster)
What is phagocytosis?
The wrapping around of something (solid) to bring into the cell.
What is pinocytosis?
The wrapping around of a fluid to bring into the cell.
What is a peripheral protein?
A protein that is inside or outside the surface of the membrane.
What is an integral protein?
A protein within a membrane [has both hydrophillic and hydrophobic parts]
what is a Solute?
A substance that can be dissolved
What is a polar molecule movement?
When hydrophillic molecules are stopped by the lipid layer.
What is a nonpolar molecule movement?
When hydrophobic molecules can dissolve into the lipid layer and cross over.
What is the formula for water potential?
water potential = solute potential (-) + pressure potential (+)