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22 Cards in this Set
- Front
- Back
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cell theory
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* all living things are composed of 1 or more cells
* cells are the basic units of structure and function in an organism * cells come only from the reproduction of existing cells |
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organelles
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a cell component that performs specific functions for the cell
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cell membrane
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the thin layer of membrane that surrounds a cell
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nucleus
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the large organelle near the center of the cell
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eukaryote
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organism whose cells contain a membrane-bound nucleus and other organelles
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prokaryote
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unicellular organisms that lack a membrane-bound nucleus and other organelles.
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Selectively permeable
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some substances can easily cross while others cannot cross at all
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Mitochondria
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transfers energy from organic compound to ATP
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Ribosome
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organizes the synthesis of proteins
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Endoplasmic Reticulum
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prepares proteins for export (rough)
synthesizes steriods regulates calium levels (smooth) |
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Golgi Apparatus
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processes and packages substances produced by the cell
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Lysosomes
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digests molecules
old organelles and foreign substances |
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Cytoskeleton
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a network of long protein strands located in the cytosol
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Microfilaments and microtubules
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threads made of protein
contribute to cell movement |
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Cilia
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short, numerous, hairlike organelles that extend from the surface of a cell
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Flagella
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long, less numerous, hairlike organelles that extend from the surface of a cell
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Chromosomes
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chromatin strands that coil up and become densely packed
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Chromatin
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a combination of DNA and protein
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Nucleolus
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the site where ribosomes are synthesized and partially assembled
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Cell wall
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supports and protects the cell
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Vacuoles
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stores enzymes and waste products
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Chloroplasts
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energy from sunlight is converted into chemical energy
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