A&P CH3 Cells
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| active transport | process that requires an expenditure of energy to move a substance across a cell membrane, usually moved against the concentration gradient
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| apoptosis | the death of cells that occurs as a normal and controlled part of an organism's growth or development.
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| cell membrane | the selectively permeable outer boundary of a cell consisting of a phospholipid bilayer embedded with proteins, plasma membrane or cytoplasmic membrane
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| centrosome | cellular organelle consisting of two centrioles
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| chromosome | rod-like structure that condenses from chromatin in a cell’s nucleus during mitosis
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| cytoplasm | the contents of a cell, excluding the nucleus and cell membrane
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| cytoskeleton | a microscopic network of protein filaments and tubules in the cytoplasm of many living cells, giving them shape and coherence
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| differentiation | cell specialization
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| diffusion | random movement of molecules from a region of higher concentration toward one of lower concentration
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| endocytosis | process by which a cell membrane envelops a substance and draws it into the cell in a vesicle
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| endoplasmic reticulum | organelle composed of a system of connected membranous tubules and vesicles along which protein is synthesized
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| equilibrium | a state of balance between two opposing forces
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| exocytosis | transport of substances out of a cell in vesicles
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| facilitated diffusion | diffusion in which carrier molecules transport substances across membranes from a region of higher concentration to a region of lower concentration
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| filtration | movement of material through a membrane as a result of hydrostatic pressure
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| Golgi apparatus | an organelle that prepares cellular products for secretion
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| lysosome | organelle that contains digestive enzymes
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| mitochondrion | organelle housing enzymes that catalyze reactions of aerobic respiration
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| mitosis | diffusion of a somatic cell to form two genetically identical cells
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| nucleolus | a small structure within the cell nucleus that contains RNA and proteins
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| nucleus | a cellular organelle enclosed by a double-layered, porous membrane and containing DNA; the dense core of an atom composed of protons and neutrons
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| organelle | a part of a cell that performs a specialized function
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| osmosis | diffusion of water through a selectively permeable membrane in response to a concentration gradient
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| phagocytosis | process by which a cell engulfs and digests solid substances
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| pinocytosis | process by which a cell engulfs droplets of fluids from its surroundings
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| ribosome | organelle composed of RNA and protein that is a structural support for protein synthesis
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| selectively permeable | a membrane that allows some molecules through but not others; semipermeable
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| vesicle | membranous cytoplasmic sac formed by infolding of the cell membrane
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