Cell Flashcards
Make-up the lipid bilayer
What make-up the lipid bilayer?
Made of two layers of Phosholipid molecules, Cholesterol, and Glycolipids
What CAN cross the cell membrane
Selective Permeability
(Can Cross)
Small, nonpolar molecules: Oxygen (02), Carbon Dixodie (CO2), Small hydrophobic molecules.
What CANNOT cross the cell membrane
Selective Permeability (Cannont Cross)
Large polar molecules: Glucose, Amino Acid, Sucrose
Charged Ions: Sodium (Na+), Potassium (K+), Calcium (Ca2+)
Definition
Concentration Gradient
Difference in the Concentration of a substance from one location to another.
What influence rate of diffusion
Concentration gradient, Temperature, Molecular Size, Surface Area, and Membrane Permeability
Definition
Active Transport
Moving molecules from low to high concentration within the help of Energy ATP
Definition
Facilitated Diffusion
Movement of large molecules through carrier proteins in the membrane from high to low concentrations.
Definition
Osmosis
Molecules move from high to low concentrations through a membrane
Definition
Hypertonic
Having a higher concentration of solute (solids) than another solution
Definition
Hypotonic
Having a lower concentrations of solute (solids) than another solution.
Definition
Isotonic
When the concentration of two solutions is the same
Definition
Endocytosis (Phagocytosis)
Molecules move in a cell by forming a vesicle.
Definition
Exocytosis
Molecules move out of a cell by forming a vesicle.
