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32 Cards in this Set
- Front
- Back
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cell
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basic units of living organisms
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compound light microscope
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uses a series of lenses to magnify ojects in steps
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cell theory
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1.all organisms are composed of one or more cells
2.the cell is the basic unit of organization of organisims 3.All cells come from preexisting cells |
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electron microscope
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uses a beam of electrons instead of natural light to magnify structures up to 500 000 times their actual size
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prokaryote
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most unicellular organisms such as bacteria that do not have membrane-bound structures
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eukaryote
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membrane bound structures
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organelle
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membrane-bound structures within eukaryotic cells
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nucleus
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the central membrane-bound organelle that manages cellular functions
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plasma membrane
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the boundry between the cell and it's environment
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homeostasis
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the process of maintaining the cell's environment
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selective permeability
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the membrane of a cell allows some molecules into the cell while keeping others out
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phospholipid
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lipids with a phosphate group attached to them
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fluid mosaic model
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It is fluid because the membrane is lexible
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transport protein
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allow needed substances or waste materials to move through the plasma membrane
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cell wall
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a fairly rigid structure located outside the plasma membrane that provides additional support and protection
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chromatin
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strands of genetic material (DNA)
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nucleous
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makes ribosomes
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ribosome
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the sites where the cell assembles enzymes and other proteins according to the directions of DNA
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cytoplasm
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a clear,gelatinous fluid inside a cell
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endoplasmic reticulum
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the site of cellular chemical reactions
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Golgi apparatus
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after proteins are produced they are transferred to the Golgi apparatus
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vacuole
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are for temporary storage of materials
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lysosome
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an organelle that contains digestive enzymes
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chloroplast
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an organelle that captures light energy and produces food to store for a later time
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plastid
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used for storage-different ones store different things
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chlorophyll
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traps light energy and gives leaves and stems their green colour
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mitchondria
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are membrane-bound organelles in plant and amimal cells that transform energy for the cell
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cytoskeleton
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a suppport structure within the cytoplasm
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microtubule
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thin hollow cylinders made of protein
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microfilament
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thin solid protein fibers
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cilia
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short mumerous hairlike projections that move in a wavelike motion
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flagella
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longer projections that move with a whiplike motion
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