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19 Cards in this Set
- Front
- Back
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cell |
in biology, the smallest unit that can perform all life processes , they are covered by a membrane and have DNA and cytoplasm |
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cell membrane |
a phospholipid layer that covers a cell's surface and acts as a barrier between the inside of a cell and the cell's environment |
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organelle |
one of the small bodies in a cell's cytoplasm that are specialized to perform a specific function |
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nucleus |
in a eukaryotic cell, a membrane-bound organelle that contains the cell's DNA and that has a role in processes such as growth, metabolism and reproduction |
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prokaryote |
an organism that consists of a single cell that does not have a nucleus and has no membrane-bound organelles |
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eukaryote |
an organism made up of cells that have a nucleus enclosed by a membrane: they include animals, plants and fungi but not archaea or bacteria |
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cell wall |
a rigid structure that surrounds the cell membrane and provides support to the cell |
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ribosome |
a cell organelle composed of RNA and protein: the site of protein synthesis |
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endoplasmic reticulum |
a system of membranes that is found in a cell's cytoplasm and that assists in the production, processing and transport of proteins and in the production of lipids |
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mitochondrion |
in eukaryotic cells, the cell organelle that is surrounded by two membranes and that is the site of cellular respiration |
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Golgi complex |
a cell organelle that helps make and package materials to be transported out of the cell |
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vesicle |
a small cavity or sac that contains materials in a eukaryotic cell: forms when part of the cell membrane surrounds the materials to be taken into the cell or transported within the cell |
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lysosome |
a cell organelle that contains digestive enzymes |
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tissue |
a group of similar cells that perform a common function |
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organ |
a collection of tissues that carry out a specialized function of the body |
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organ system |
a group of organs that work together to perform body functions |
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organism |
a living thing; anything that can carry out life processes independently |
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structure |
the arrangement of parts in an organism |
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function |
the special, normal, or proper activity of an organ or part |
