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Cells Flashcards

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2984480803ATP* (3.2)(adenosine triphosphate) main energy source that cells use for most of their work0
2984480804active transport* (3.3)Energy-requiring process that moves material across a cell membrane against a concentration difference1
2984480805bilayertwo layers2
2984480806cell membrane*A cell structure that controls which substances can enter or leave the cell.3
2984480808cell wall* (3.2)A rigid structure that surrounds the cell membrane and provides support to the cell4
2984480809chlorophyllA green pigment found in the chloroplasts of plants, algae, and some bacteria5
2984480810chloroplast* (3.2)An organelle found in plant and algae cells where photosynthesis occurs6
2984480811 ciliaThe hairlike projections on the outside of cells that move in a wavelike manner7
2984480812cytoplasm (3.1)Gel-like fluid where the organelles are found8
2984480813cytoskeleton (3.2)A network of fibers that holds the cell together, helps the cell to keep its shape, and aids in movement9
2984480814nucleus* (3.1)A part of the cell containing DNA and RNA and responsible for growth and reproduction10
2984480815 osmosisDiffusion of water across a selectively permeable membrane11
2984480816differentiationProcess in which cells become specialized in structure and function12
2984480817diffusion (3.3)Movement of molecules from an area of higher concentration to an area of lower concentration.13
2984480818phospholipid bilayer*Plasma membrane layers composed of phospholipid molecules arranged with polar heads facing the outside and nonpolar tails facing the inside.14
2984480819endocytosis (3.3)Active transport process where a cell engulfs materials with a portion of the cell's plasma membrane and releases the contents inside of the cell.15
2984480820endoplasmic reticulum (smooth and rough) (3.2)The organelle that transports proteins around the cell.16
2984480821hydrophilicWater loving17
2984480822endosymbiosis / endosymbiotic theory (3.2)A process in which a unicellular organism (the "host") engulfs another cell, which lives within the host cell and ultimately becomes an organelle in the host cell; also refers to the hypothesis that mitochondria and plastids were formerly small prokaryotes that began living within larger cells.18
2984480823equilibriumA condition in which a system is experiencing no net change19
2984480824eukaryote* (3.1)A cell that contains a nucleus and membrane bound organelles20
2984480826exocytosis (3.3)a process by which the contents of a cell vacuole are released to the exterior through fusion of the vacuole membrane with the cell membrane.21
2984480827facilitated diffusion (3.3)A process in which substances are transported across a plasma membrane with the concentration gradient with the aid of carrier (transport) proteins; does not require the use of energy.22
2984480828flagellumA long, whiplike structure that helps a cell to move23
2984480830Golgi bodyThe organelle that packages proteins before they leave the cell.24
2984480831HomeostasisCells and systems maintain a constant internal balance25
2984480832HydrophobicWater fearing26
2984480834hypertonic solutionWhen comparing two solutions, the solution with the greater concentration of solutes27
2984480835hypotonicIn comparing two solutions, referring to the one with a lower solute concentration.28
2984480836 lysosomeIn an ANIMAL CELL. Contain chemicals that break down certain materials. Breaks down dead cells.29
2984480837isotonicDescribes a solution whose solute concentration is equal to the solute concentration inside a cell30
2984480838fluid mosaic modelThe currently accepted model of cell membrane structure, which envisions the membrane as a mosaic of individually inserted protein molecules drifting laterally in a fluid bilayer of phospholipids.31
2984480839unicellularOne cell32
2984480840 macromoleculeA type of giant molecule formed by joining smaller molecules which includes proteins, polysaccharides, lipids, and nucleic acids.33
2984480841mitochondrion (singular)* (3.2) mitochonria (plural)A membraneā€bound organelle found in most eukaryotic cells; site of cellular respiration.34
2984480842multicellularMany cells35
2984480843 nucleolusFound inside the nucleus and produces ribosomes36
2984480844organelle* (3.1)Small structures within cells that perform specific functions (ex. mitochondria, nucleus, ER).37
2984480845osmosis (3.3)Diffusion of water across a selectively permeable membrane38
2984480846passive transport* (3.3)Requires NO energy, Movement of molecules from high to low concentration, Moves with the concentration gradient39
2984480847phospholipid bilayer (3.2)structure of the cell membrane40
2984480848 plasmolysisthe contraction or shrinking of the cell membrane of a plant cell in a hypertonic solution in response to the loss of water by osmosis41
2984480849plasma membrane (3.1)A selectively-permeable phospholipid bilayer forming the boundary of the cells42
2984480850prokaryote* (3.1)Unicellular organism that lacks a nucleus43
2984480851 pseudopodfalse foot which amoebas use to move44
2984480852ribosome* (3.1)Make protein45
2984480853semi-permeablecharacteristic of a cell membrane which allows some molecules to pass through but not others46
2984480854 simple diffusionNet movement of dissolved particles from higher concentration to a region of lower concentration47
2984480855sodium-potassium pump (3.3)a carrier protein that uses ATP to actively transport sodium ions out of a cell and potassium ions into the cell.48
2984480856solutionA homogeneous mixture of two or more substances49
2984480857 soluteSubstance being dissolved50
2984480858 solventIn a solution, the substance in which the solute dissolves.51
2984480859transport protein (3.3)A membrane protein that is responsible for moving hydrophilic substances from one side to the other.52
2984480860 turgor pressurewater pressure inside a plant cell's central vacuole53
2984480861vacuole (3.2)Cell organelle that stores materials such as water, salts, proteins, and carbohydrates54
2984480862vesicle (3.2)Small membrane-bound sac that functions in moving products into, out of, and within a cell.55
2984480863virus (3.1)A tiny, nonliving particle that invades and then reproduces inside a living cell.56
2984503580ameobaprotist that moves and feeds with the help of pseudopods57
2984521587hydrophobicWater fearing58
2984526072Modern Cell Theory*All organisms are composed of cells, the cell is the simplest of all units of life, only come from preexisting cells and all cell species have many fundamental similarities in chemical composition and metabolic mechanisms59
2984526073LeeuwenhoekA Dutch merchant, who in the late 1600s made the first simple microscope and observed microscopic life (protozoa).60
2984528106Compound MicroscopeMagnifies the image using two lenses at once61
2986350964organellesA membrane-enclosed structure with a specialized function within a cell.62
2986350965selective permeability*a process in which a membrane allows some molecules to pass through while keeping others out.63
2986364680chloro-green64
2986364681cyto-cell (prefix) cell; cytoplasm65
2986366003pro-before66
2986366004eu-true67
2986395789hypo-Under, below68
2986395790hyper-over69
2986395791iso-equal70
2986392200hypo-below71
2988146405bi-two, double72
2988150637-tonicStrength,concentration73
2999005280-philicloving74
2999008454-phobicfearing75
3010448009eukaryotic cell (3.1)A type of cell with a membrane-enclosed nucleus and membrane-enclosed organelles. Examples of organisms with these cells are protists, plants, fungi, and animals.76
3010477346prokaryotic cell (3.1)A type of cell lacking a membrane-enclosed nucleus and membrane-enclosed organelles. Organisms with prokaryotic cells (bacteria and archaea) are called prokaryotes.77
3010499344central vacuole (3.2)large "holding container" in plant cells for water; helps maintain turgor pressure in plants.78
3010561252vesicle transport (3.3)type of active transport in which substances are carried across the cell membrane by vesicles79

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