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Life Science

Chapter 3

Atom tiny building blocks of mater made up of protons, neutrons and electrons
element a substance that contains only one type of atom
compound matter that is made up of 2 or more elements
organic compound compound that always contains hydrogen and carbon; associated with living things
inorganic compound made of elements other than carbon; associated with non living things
enzymes type of protein that regulates nearly all chemical reactions in cells
passive transport movement of substances through a cell membrane without the use of cellular energy
diffusion a type of passive transport in cells in which molecules move from an area where there are more to areas where there are fewer of them
equilibrium occurs when molecules of one substance are spread evenly through out another substance
osmosis type of transport that occurs when water diffuses through a cell membrane
active transport energy requiring process in which transport proteins bind with particles and move them through a cell membrane
exocytosis process by which vesicles release their contents outside the cell
endocytosis the process by which cells take in a substance surrounding it with the cell membrane
metabolism total of all chemical reactions in an organism
photosynthesis food making process by which plants and many other producers use light energy to produce glucose and oxygen from carbon dioxide
respiration a series of chemical reactions used to release energy stored in food molecules
Created by: sbeck