Transport/energy Flashcards
Maintains homeostasis
Allows nutrients in
Removing waste
Cell membrane
Phospholipids
Are arranged in bilayer
Integral protein
Go whole way through bilayer
Transmembrane protein
Peripheral protein
Loosely attached to membrane
Cholesterol
Helps stabilize membrane at warmer temps and keep membrane fluid
Passive transport
Movement of molecules down the concentration gradient with no energy
Simple diffusion
Movement from high to low concentration
No atp
No protein
Tonicity
Ability of surrounding solution to cause a cell to gain or lose water
Isotonic
Solute concentration of a cell and its environment are equal
Hypotonic
Solute concentration lower in the cell
Water moves in cell
Swells
Hypertonic
Solute concentration greater in the cell
Water moves or if cell
Shrinks
Facilitated diffusion
High to love concentration
No atp
Transport protein required
Aquaporins
Integral. Protein channels that diffuses water very rapidly
Active transport
Moves against concentration gradient
Needs energy
Ion pumps
Low to high concentration
ATP required
Transport proteins required
Bulk transport
Transporting molecules in or out within a vesicle that fuses within the cell membrane
Exocytosis
Exports bulky molecules such as proteins and polysaccharides
Endocytosis
Important substances useful to the liveliness of the cell
Phagocytosis
Engulfment of particle by wrapping cell membrane around it forming a vacuole
Solids
Pinocytosis
Fluids are taken into small vesicles
Liquids
Receptor mediated
Uses receptors to interact with a specific protein to initiate a vesicle formation
Chemical reactions used for
Cell maintenance
Manufacturing cell parts
Cell replication
Energy
To cause change or to perform work
Kinetic energy
Energy of motion