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Cell Organelles
the functions of organelles
10
Anatomy
12th Grade
09/23/2007

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Term
Cell Membrane
Definition
-the outer limit of the cell
-controls what moves in and out of the cell
-selectively permeable
-allows cells to communicate
-can quickly heal/ seal tiny breaks but if too bad the cell can die
Term
Ribosomes
Definition
-tiny spherical structures made of protein and RNA
-scattered in cytosol or connected to the endoplasmic reticulum
-Sites for protein synthesis
Term
Endoplasmic Reticulum
Definition
-Membrane bound, flattened sacs filled with fluid
-communicate with cell membran and nuclear envelope
-Provides transport system for molecules
-involved in protein and lipid synthesis
*-rough ER has ribosomes
*-smooth ER no ribosomes, synthesizes lipids, breaks down drugs
Term
Endoplasmic Reticulum
Definition
-Membrane bound, flattened sacs filled with fluid
-communicate with cell membran and nuclear envelope
-Provides transport system for molecules
-involved in protein and lipid synthesis
*-rough ER has ribosomes
*-smooth ER no ribosomes, synthesizes lipids, breaks down drugs
Term
Golgi Apparatus
Definition
-Flattened membrane sacs that packages and delivers proteins from rough ER
-vesicles
-membraneous sacs vary in size and contents, stores substances and used for moving )trafficing substances into and out of the cell
Term
Mitochondria
Definition
-elongated fluid filled sacs that move slowly in the cell and can divide.
-outer and inner membrane that fold to increase surface area.
-involved in chemical reactions that release energy from glucose and transfers this energy into making ATP, which it can use.
Term
Lysosomes
Definition
-garbage disposal
-tiny membraneous savs that contain enzymes that break down proteins, carbs, and nucleic acids(RNA, DNA) including foreign particles
Term
Peroxiosmes
Definition
-similar to lysosomes
-catalyze metabolic reactions that release hydrogen peroxide (toxic)
-breaks down H2O2
Term
Cilia
Definition
-Short hair-like projections
-propel substances on cell surface
-chemicals in cigarette smoke destory cilia= decrease ability to expel bacteria
Term
Flagellum
Definition
-long tall-like projection
-usually on 1 cell
-provide mobility to sperm
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