Andrea's

Andrea's - Term Definition Nucleus Control center of the...

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Term: Nucleus Definition: Control center of the cell, contains all the genetic material for the cell. Term: Nuclear Envelope Definition: Inner and Outer lipid bilayer separated by narrow fluid space, contains pores that allow for exchange of material nucleus and cytoplasm Term: Cell Definition: are the building blocks of all living things they are not all the same but share the same structures Term: Nucleoli Definition: 1 or 2 small dense bodies composed of RNA and proteins, is the site of ribosome assembly Term: Chromatin Definition: composed of loosely coiled DNA and protein, is present when cell is not dividing
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Term: Plasma Membrane Definition: Barrier that separates cellular from surrounding environment it is semipermeable its composed of phospholipids, proteins, cholesterol, and carbohydrates Term: hydrophobic tails Definition: in the interior of the plasma membranes; hates water Term: hydrophilic heads Definition: at the plasma membrane surface it likes water Term: protein channels and carrier molecules Definition: permit water soluble substances to move across membrane Term: microvilli Definition: finger-like projections that increase surface area for absorption
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Term: cilia Definition: extension of membrane containing microtubules they move fluid, mucus over the cell Term: tight junctions Definition: membranes of cells fused together prevents material from passing through Term: desmosomes Definition: anchoring junctions that prevent cells from being pulled apart Term: gap junctions Definition: small channels between cells that allow ions and molecules to pass from one cells cytoplasm to the next cell Term: cytoplasm Definition: cytoplasm is the material outside the nucleus and inside the plasma membrane it contains cytosol, organelles, and inclusions
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Term: cytosol Definition: fluid that suspends other elements Term: organelles Definition: "little organs" that perform a specific function for the cell Term: Inclusions Definition: not essential, storage structures: glycogen, lipid droplet, pigment Term: Mitochondria Definition: "Powerhouses" of the cell specializes in aerobic respiration makes most of the bodies ATP Term: Ribosomes Definition: made up of protein and rRNA its the site of protein synthesis are free in the cytoplasm and in the RER
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Term: Rough ER Definition:
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