Ch 3: Cell Structure Flashcards
Cell theory
-all living things are made of cells
-All cells arise from pre-existing cells
Definition of cells
Building blocks of living things
-Surrounded by plasma membrane
-Self sustained
Definition of plasma membrane
Semi permeable that surrounds selling most organelles
-Made up of phospholipids
-Separate living parts of cell from outside environment
-Regulate transport of molecules
Molecule, transport systems
Passive transport and active transport
Passive transport
(up)-(down)
-Diffusion
-Osmosis
-Facilitated diffusion
-Goes with material
Active transport
(down)-(up)
-Direct
-Indirect
-Large scale transport (ATP)
-Goes against material
Isotonic
Same concentration inside and out
Hypotonic (cytolysis)
Outside concentration is lower than inside
Hypertonic (crenation)
Outside concentration is higher than inside
Exocytosis
Reversing endocytosis to remove waste products from cells
Endocytosis
-Also called phagocytosis
-Cell wraps the plasma membrane around an object and engulfs it
Pinocytosis
Cells take in water with dissolved nutrients into vesicles
Dynamic equilibrium
Molecules are still moving in both directions, but the net movement is zero
Definition of diffusion
Movement of molecules across plasma membranes from (up) to (down) to establish dynamic equilibrium
-No energy required
Definition of osmosis
Diffusion of water through semi permeable membrane from (down) to (up) for dynamic equilibrium
-No energy required
