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14 Cards in this Set
- Front
- Back
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What are 3 characterisitics of the cell theory?
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All living organisms are made of one or more cells
Cells are the smallest unit of life cells produce cells |
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Define cytology.
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study of cells
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Define prokaryotic cell and give an example.
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cells that have no true nucleus. ex. bacteria
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Define Eukaryotic cell and give an example.
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cells that have a true nucleus which contains the genetic material. plants and animals
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Why are cells generally small?
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for better communication
surface-area to volume-ratio As a cell grows its volume increases at a faster rate that its sruface area. the cells basically split apart. |
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Some cells which are larger have adapted by what? (3 things)
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have more than one nucleus
actively move material around are long and skinny |
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Name the 3 main characteristics of eukaryotic cells.
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Plasma (cell) membrane- encloses a cell and seperates its contents from its surroundings
Nucleus-information center contains DNA Cytoplasm-semi fluid material that fills the interior of the cell. It contains organelles which are cell parts that are surrounded by a membrane. |
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What is the Endoplasmic Reticulum (ER)? (5 characteristics)
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large internal network of membranes
functions as channels and passageways for proteins and lipids to move in the cell serves as a site fore chemical reactions can form compartments and vesicles (sacs) found in plant and animal cells |
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What is a ribosome?
How does it function? |
complex assemblies of protein and RNA
it synthesizes (assembles) proteins |
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Define smooth ER.
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has no ribosomes attached* and functions in synthesis of lipids and detoxification of drugs
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Define rough ER.
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has ribosomes on surface* and functions to export assembled proteins from the cell
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In one word define the Golgi Apparatus.
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specialists
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What is the funciton of the Golgi Apparatus?
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functions in the collection, packaging and distribution of molecules (sugars, proteins, and lipids) synthesized in one place in the cell and used in another
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What were the 2 examples given in class for the Golgi Apparatus?
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glycoprotein (sugar plus protein) or glycolipid (sugar plus lipid)
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