Practical 1 Study Sheet- Cell Organelles

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Plasma Membrane
Separates cell contents from the surrounding environment
Cytoplasm
Fluid that contains cell contents; major site of most activities carried out by the cell
Cytosol
Fluid that contains cell contents
Nucleus
Contains genetic materials "genes', "control center of the cell"
Nuclear envelope
Boundary for the nucleus
Nuclear pores
Permit easy passage of protein and RNA molecules
Chromatin
Coils and condenses into chromosomes when dividing to form daugter cells
Nucleolus
Site ribosome subunit manufacture
Centrioles
Direct the formation of the mitotic spindle during cell division; form the bases of cilia and flagella
Mitochondria
"powerhouse of the cell" contain enzymes that oxidize foodstuffs to produce cellular energy (ATP).
Golgi apparatus
Plays a role in packaging proteins or other substances for export and from the cell or incorporation into the plasma membrane and in packaging lysosomal enzymes.
Smooth endoplasmic reticulum
Abundant in cells that produce steriod-based hormones and that are active in lipid metabolism and during drug detoxification activities
Rough endoplasmic reticulum
Modify, store, and dispatch new formed proteins; involved in phosolipid and cholesterol synthesis
Ribosomes
Actual sites of protein synthesis
Lysosome
To digest worn-out cell organelles and foreign substances