Pozen Biology Unit 1B Cell, Transport 14-15

15 terms by lhsscience101 Teacher

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prokaryote

a single-celled organism that does not have a nucleus or membrane-bound organelles; includes bacteria

eukaryote

organism made up of cells that have a nucleus enclosed by a membrane; includes protists, animals, plants, and fungi

organelle

one of the small structures found in the cytoplasm of a cell and that perform a specific function

nucleus

a membrane-bound organelle that contains the cell's DNA and controls its functions

plasma membrane

a phospholipid bilayer that covers a cell's surface and acts as a barrier

ribosome

organelle that is the site of protein synthesis

cytoplasm

the fluid between the cell membrane and the nucleus, and the organelles it holds

mitochondria

organelle is the site of cellular respiration which produces ATP

chloroplasts

organelles found in plants and algae where photosynthesis occurs

selective permeability

property of a membrane that allows some materials to pass through while keeping others out

diffusion

the movement of particles from regions of higher to lower concentrations

osmosis

the diffusion of water across a selectively permeable membrane

isotonic

solution where the concentration of dissolved materials inside and outside the cell is equal; causes no change in cell size

hypotonic

a solution where the concentration of dissolved material inside the cell is higher than outside, causing the cell to swell

hypertonic

a solution where the concentration of dissolved material outside the cell is higher than inside, causing the cell to shrink

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