Organelles




 * Present in all cell types
 * Regulates what enters and leaves the cell
 * Separates internal from external enviorment
 * Composed of a lipid bilayer
 * [[image:plasma%20membrane.gif width="330" height="229"]]
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 * ONLY in plant cells
 * Surrounds the cell membrane
 * Helps protect and support the cell
 * Fluid filled area between the nucleus and cell membrane
 * Filled with organelles
 * "Cyto" = cell, "plasm" = fluid
 * Cytosol = cell fluid only
 * In eukaryotic cells
 * The control center of a cell, and contains DNA
 * Double layer membrane called the nuclear envelope
 * Covered with many small pores
 * Nucleolus synthesizes (makes) ribosomes, which are important in making proteins
 * Extension of the nuclear membrane
 * Regions with ribosomes = Rough ER (transport ribosomes)
 * Regions w/o ribosomes = Smooth ER (lipid synthesis)
 * [[image:endoplasmicreticulumfigure1.jpg]]
 * Sites of protein synthesis
 * Sorts, chemically alters, and packages important molecule
 * The powerhouse of the cell
 * Generates fuel for cell's activities
 * Sites of cellular respiration
 * Responsible for intracellular digestion
 * Lysosomes are membranous sacs of acidic enzymes
 * Rare in plant cells
 * Powerhouse of the plant cell
 * Chlorophyl pigment gives plants their color
 * Site for **photosynthesis**
 * Detoxify harmful substances that enter the body
 * Stores extra material for the cell
 * Nutrients, water, etc
 * Plants have a large central vacuole
 * Animals have smaller vacuoles
 * Helps support cell structure and drive cell movement
 * **Cilia** - short hair-like extensions on the cell that aid in cell movement
 * **Flagella** - long hair-like extensions on the cell that helps the cell propel

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