Ch 7.3 Review Flashcards
Homeostasis
Internal balances external
Plasma membrane
Cell membrane
Selective permeability
Semi permeable
Structures of a plasma membrane
Lipid bilayer and proteins
Lipid bilayer
composed of lipids, proteins, and carbohydrates
A lipid bilayer has…
Phospholipid, and fluid mosaic model/cell membrane
Proteins in a structure
Determine which particles pass
Cellar transport
Diffusion, osmosis, passive transport, active transport, bulk transport
Diffusion
Passive, happens naturally
Diffusion has
Brownian motion, process - high concentration to lower concentration, dynamic equilibrium, concentration gradients, across plasma membrane
Brownian motion
Molecules move at random. Founded by me brown
Dynamic equilibrium
Reaches balance of molecules distributed
Concentration gradients
How much solute is dissolved in solvent, passive transport, speeds up diffusion, how much one side vs the other
Osmosis
Diffusion of water- cell membrane can’t control. Passive transport requires no energy
Osmosis has
Hypotonic solutions, hypertonic solutions, isotonic solutions
Hypotonic solution
Is a solution of high level of solvent, low level of solute
Ex: distilled water
Hypotonic solution has
Turgor pressure, contractile vacuoles
Turgor pressure
Water pressure inside the cell
Contractile vacuoles
Hypotonic cells need them, organelle to pump water
Hypertonic solution
High level of solute, a low level of solvent
Ex: salt water
Hypertonic solution has
Plasmolysis
Plasmolysis
Shrinkage of a cell due to loss of water
Isotonic solution
Stays the same
Passive transport
Move to lower concentration, requires no energy to occur