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30 Cards in this Set
- Front
- Back
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What is the cell? |
The basic structural and functional unit of the body. |
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What is the function of the cell? |
Performs all basic life functions. |
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What are the principal parts of the cell? |
Cell membrane, cytoplasm, non membranous organelle, membranous organelle, nucleus. |
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What is the function of the cell membrane? |
Surrounds the cell and is selectively permeable. |
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What is the cell membrane composed of? |
Phospholipid bilayer, cholesterol, protein, carbohyrate and microvilli. |
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What are the composition of the Phospholipid bilayer? |
Phosphate head group, FA tail. |
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Function of cholesterol |
Adds stability |
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Integral Proteins |
Within membrane, both hydrophillic/hydrophobic region. |
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Periphereal Proteins |
Attached to either surface of integral protein |
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Membrane carbohydrates |
Bounded to protein or lipid, only on outer surface. Functions in cell recognition and anchors cells together. |
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Microvilli |
Small projections of cell membrane. Located on kidney, small intestine. Increase surface area. |
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Fluid Mosaic Model |
The fluid = membrane constiituiteunts. Mosaic = protein dot surface like tiles of a mosaic. |
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Cytoplasm |
Area between the inside of cell membrane and outside of nucleus. |
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What are the two division of cytoplasm? |
Cytosol, organelles. |
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Cytosol |
Gel-like intracellular fluid. |
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Ribosomes |
Site of protein synthesis. Attached to the endoplasmic reticulum. |
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Centrosomes |
Organized microtubules to from spindle appratus. Function is unknown. |
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Cytoskeleton |
Determines cell shape. Formed from protein. Function = cell division, movement/anchoring of organelles + proteins. |
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Microfilament |
Contains actin subunit. |
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Intermediate filament |
Composition is tissue specific |
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Microtubules |
Made of tubulin. |
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Mitochondria |
Power plants, site of ATP synthesis. Contains own DNA, RNA and protein. |
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Rough ER |
Site of protein synthesis. Has attached ribosomes. |
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Smooth ER |
synthesiszes lipids and steroids. No ribosomes |
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Golgi apparatus |
stacks of membrane disc. Modifies, sorts, packages, delivers proteins. |
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Lymosomes |
filled with digestive enzymes, digest bacteria, worn out organelles |
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Nuclues |
Cell control centre |
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Nuclear envelope |
double membrane with nuclear pores. |
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Nucleolus |
dense region of DNA, RNA, protein where ribosomes made. |
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Chromosomes/chromatids |
Contains DNA, histone proteins. |
