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23 Cards in this Set
- Front
- Back
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Nucleoli
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Nucleolus. Densest part in nucleus. Serves as the site of ribosome synthesis and assembly
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Nuclear envelope
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Also known as nuclear membrane. A double lipid bilayer membrane which surrounds the genetic material and nucleolus and eukaryotic cells
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Nuclear pores
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Protein complexes that cross the nuclear envelope
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Middle lamella
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A pectin layer which cements the cell walls two adjoining cells together. Plants use these to give them stability
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Pectin
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A polysaccharide contained in the primary cell walls of plants
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cellulose
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Main part of plant cell walls, insoluble
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Microfilaments
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A small rodlike structures, about 4-7nm in diameter, present in numbers in the cytoplasm of eukaryotic cells
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Microtubules
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Hey how low cylindrical structure in the cytoplasm, involved in intracellular shape and transport
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Brownian movement
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The erratic random movement of microscopic particles in a fluid
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Facilitated diffusion
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The process of passive transport of molecules or ions across a biological membrane via integral proteins
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Isotonic
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Same
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Hypotonic
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In a solution with less
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Hypertonicpassive
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In a solution with more
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Passive transport
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Molecules move from high to low concentration. No energy required. With
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Active transport
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Molecules move from low to high concentration. Energy is required. Against
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Carrier protein
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Participate in facilitated diffusion which means carrier proteins help speed up diffusion by carrying substances across the membrane. Passive
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Ion channel
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Carrier of ions. Passive
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Aquaporins
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Transport water molecules. Passes
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Protein pumps
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Proteins that require energy to transport substances against gradient. Active
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Endocytosis
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Large particles engulfed by the cell, not passing through the membrane
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phagocytosis
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Movement of large particles into the cell, food.
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Pinocytosis
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Movement of large quantities of water into the cell
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Exocytosis
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Substances are removed by the cell
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