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Miller and Levine Biology Ch 7 Flashcards

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5799378160The Cell Theory1. All living things are made up of cells 2. Cells are the basic units of structure and function in living things. 3.New cells are produced from existing cells.0
5799378161How do microscopes workUse lenses to magnify the image of an object by focusing light or electrons1
5799378162Prokaryotic CellsDo not separate genetic material in a nucleus2
5799378163Eukaryotic CellsNucleus separates genetic material from the rest of the cell3
5799378164CellBasic unit of life4
5799378165Cell membraneA thin, flexible barrier around a cell; regulates what enters and leaves the cell5
5799378166NucleusA large membrane enclosed structure that contains genetic material in the form of DNA and controls many of the cell's activities6
5799378167CytoplasmThe portion of the cell outside the nucleus.7
5799378168Organelles"little organs"8
5799378169VacuoleLarge saclike, membrane-enclosed structures that store materials like salts, proteins, and carbohydrates.9
5799378170LysosomeS: Small organelles filled with enzymes. F: Break down lipids, carbs, and proteins to be used by rest of cell. Break down organelles which aren't useful anymore.10
5799378171CytoskeletonS: Network of protein filaments F: Helps cell maintain shape and is involved in movement11
5799378172MicrofilamentsS: Threadlike structures made up of actin protein. Extensive network. F: Help cells move, support cell. Responsible for cytoplasmic movements.12
5799378173MicrotubulesS:Hollow structures made up of proteins called tubulins. F: Maintain cell shape, help separate chromosomes in cell division13
5799378174CentriolesS: Organelles in animal cells formed from tubulins. F: Help organize cell division14
5799378175RibosomeS: Small particles of RNA and protein found throughout the cytoplasm. F: Produce protein by following instructions from DNA15
5799378176Endoplasmic ReticulumS: Internal membrane system F: Assembles lipids and proteins16
5799378177Rough ERS: Ribosomes found on surface F: involved in synthesis of Proteins, chemically modify newly made proteins17
5799378178Smooth ERS: No ribosomes found on surface F: Contains collections of enzymes that perform specialized tasks18
5799378179Golgi ApparatusS: Flattened membranes F: Modifies, sorts, and packages proteins and materials for storage in cell or release from outside of the cell.19
5799378180ChloroplastS: Membrane coated, large stacks of other membranes including chlorophyll F: Convert solar energy to chemical energy stored in food20
5799378181MitochondrionS: Two membranes F: convert chemical energy stored in food into compounds that are more convenient for the cell to use21
5799378182Cell WallS: Porous barriers that surround the cell membrane F: Shapes, supports, and protects the cell22
5799378183Phospholipid BilayerFlexible, double layered sheet that makes up the cell membrane and forms a barrier between the cell and its surroundings23
5799378184Selectively PermeableA property of cell membranes that allows some substances to pass through, while others cannot24
5799378185Active transportRequires cell energy25
5799378186Passive transportMovement of materials across the membrane without cellular energy26
5799378187DiffusionRandom movement of particles from an area of high concentration to an area of low concentration due to their kinetic energy27
5799378188Facilitated DiffusionMovement of specific molecules across cell membranes through protein channels28
5799378189AquaporinA transport protein that facilitates the diffusion of water29
5799378190OsmosisDiffusion of water through a selectively permeable membrane30
5799378191Isotonic(used of solutions) having the same or equal osmotic pressure31
5799378192HypertonicA solution that has a higher concentration of solutes than another.32
5799378193HypotonicHaving a lower concentration of solute than another solution33
5799378194Osmotic PressurePressure that must be applied to prevent osmotic movement across a selectively permeable membrane34
5799378195How to maintain homeostasis1. Grow 2. Respond to the environment 3.Transform energy 4. Reproduce35
5799378196HomeostasisRelatively constant internal physical and chemical conditions that organisms maintain36
5799378197TissueA group of similar cells that perform the same function.37
5799378198OrganA collection of tissues that carry out a specialized function of the body.38
5799378199Organ SystemGroup of organs that work together to perform a specific function39
5799378200Receptora specific protein whose shape fits that of a specific molecular messenger40
5799378201Levels of Organization (Living Things)1. cells (Smallest) 2. tissue 3. organs 4. organ systems 5. organisms (Largest)41

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