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Science Ch. 3

science ch. 3

TermDefinition
Cell Membrane A thin coat of phospholipids that surrounds a cell.
Cell Theory All organisms consist of 1 or more cells. Cells are alive and the site of all life processes. All cells come from pre-existing cells.
Cytoplasm The material inside the cell membrane.
Eukaryote Living things with eukaryotic cells.
Eukaryotic Cell Cells that contain a nucleus.
Nucleus A structure enclosed by a membrane that contains most of the cell's DNA.
Organ A structure composed of 2 or more types of tissue that work together to do a specific task.
Organelle Any structure inside a cell that is enclosed by a membrane.
Organ System A group of organs that work together to do the same job.
Prokaryote Organisms with prokaryotic cells.
Prokaryotic Cell Cells that lack a nucleus.
Ribosome Structures in the cytoplasm where proteins are made. They consist of RNA and proteins.
Tissue A group of cells of the same kind that performs the same function.
ATP Adenosine Triphosphate Smaller molecules that packages energy in smaller amounts that cells can use.
Cell Wall Rigid layer that surrounds the cell membrane of a plant cell.
Central Vacuole A large storage container that is only found in plant cells.
Centriole Organelles that are found only in animal cells. They help organize the DNA in the nucleus before cell division takes place.
Cytoskeleton A cellular skeleton. It helps the cell keeps it shape. It holds cell organelles in place within the cytoplasm.
ER Endoplasmic Reticulum An organelle that helps make and transport proteins and lipids. There are 2 types of ER rough and smooth.
Golgi Apparatus A large organelle that sends proteins and lipids where they need to go.
Lysosome An organelle that recycles unneeded molecules.
Mitochondrion/Mitochondria(plural) An organelle that makes energy available to the cell.
Vacuole Sac-like organelles that store and transport materials in the cell.
Vesicle Smaller sac-like organelles that store and transport materials in the cell.
Created by: tmanfred
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