9.2 Flashcards
What is simple diffusion?
Molecules: Small nonpolar molecules
How: Goes through the phospholipid bilayer
Concentrations: High to low
What is facilitated diffusion?
Molecules: Large molecules
How: Goes through channel proteins
Concentrations: High to low
What is osmosis?
How water and other substances go through the semipermiable membrane in a cell
What is active transportation?
Molecules: Sugar
How: Goes through proteins
Concentrations: Low to high
What is a hypertonic solution?
More solute to water
What is a hyportonic solution?
More water to solute
What is a isotonic solution?
Equal solute to water ratio
What is endocytosis?
It surrounds the stuff and ejects it inside the carrier
What is exocytosis?
A vesicle ejects the stuff
Properties and structures of phospholipids
Hydrophillic heads and hydrophobic tails
Properties and structures of the cell membrane
Tails inside heads outside
Why is the ratio of surface area to volume important?
Cells need to be smaller so they can absorb nutrients easier
