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Miller and Levine Biology Chap 7 Flashcards

Miller and & Levine Biology Chapter 7

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11059807579cellbasic unit of all forms of life0
11059807580cell theoryfundamental concept of biology that states: All living things are composed of cells. Cells are the basic units of structure and function in living things. New cells are produced from existing cells1
11059807581cell membranethin, flexible double barrier that surrounds all cells; regulates what enters and leaves the cell. Made out of phospholipids and embedded proteins.2
11059807582nucleusServes as the control center for metabolism and reproduction in Eukaryotes, contains the cell's DNA3
11059807583eukaryoteorganism whose cells contain a membrane-bound nucleus4
11059807584prokaryoteunicellular organism that lacks a nucleus5
11059807585cytoplasmgel-like fluid that suspends and protects organelles and contains the materials involved in cell metabolism.6
11059807586organellespecialized structure in eukaryotes that performs important cellular functions within a cell7
11059807587vacuoleLarge fluid-filled organelle that stores materials such as water, salts, proteins, and carbohydrates (food and wastes)8
11059807588lysosomecell organelle that breaks down lipids, carbohydrates, and proteins into small molecules that can be used by the rest of the cell; involved with digestion of food within the cell9
11059807589cytoskeletonnetwork of protein filaments in a eukaryotic cell that gives the cell its shape and internal organization and is involved in movement; contains microfilaments and microtubles10
11059807590ribosomecell organelle consisting of RNA and protein found throughout the cytoplasm in a cell; the site of protein synthesis (makes proteins)11
11059807591Golgi apparatusorganelle in cells that modifies, sorts, and packages proteins and other materials from the endoplasmic reticulum for storage in the cell or release outside the cell12
11059807592chloroplastorganelle found in cells of plants and other photosynthetic organisms; site of photosynthesis13
11059807593mitochondrioncell organelle that converts the chemical energy stored in food into ATP (the energy currency of the cell); the "powerhouse of the cell"14
11059807594cell wallstrong, supporting layer around the cell membrane, gives cell it's shape and provides protection; not found in animal cells15
11059807595lipid bilayerflexible double-layered sheet that makes up the cell membrane and forms a barrier between the cell and its surroundings16
11059807596microscopedevice that produces an enlarged image of something very small17
11059807597Transmission Electron Microscope (TEM)electron microscope that is used to study the internal structure of cells18
11059807598Scanning Electron Microscope (SEM)electron microscope that scans the surface of the cell with a beam of electrons, and shows the specimen's 3-D image19
11059807599chromosomeRod-shaped body of DNA and protein that contains genetic information; in eukaryotes they are found in the nucleus; in prokaryotes, they are found in the cytoplasm20
11059807600nucleolussmall dense region where the production of ribosomes begins and RNA is synthesized21
11059807601proteina catalyzer of chemical reactions that carry out many essential functions in living things22
11059807602Rough Endoplasmic Reticulum (Rough ER)portion of ER studded with ribosomes; associated with synthesis and storage and transport of materials23
11059807603Smooth Endoplasmic Reticulum (Smooth ER)portion of ER where ribosomes are not found on surface, serves as a pathway for transport of materials throughout the cell, also associated with storage24
11059807604contractile vacuolespecialized vacuole that pumps excess water out of the cell in paramecium25
11059807605microfilamentthreadlike structure made up of a protein called actin that supports the cell26
11059807606microtubulehollow structure made up of proteins known as tubulins27
11059807607hydrophobicwater-hating28
11059807608hydrophilicwater-loving29
11059807609diffusionprocess by which particles tend to move from an area where they are more concentrated to an area where they are less concentrated30
11059807610osmosisdiffusion of water through a selectively permeable membrane31
11059807611homeostasisrelatively constant internal physical and chemical conditions that organisms maintain32
11059807612tissuegroup of similar cells that perform a particular function33
11059807613organgroup of tissues that work together to perform closely related functions34
11059807614organ systemgroup of organs that work together to perform a specific function35
11059807615passive transportmovement of particles without the use of energy from the cell; from higher to lower concentration36
11059807617Protein production sequenceDNA - RNA - Ribosome - Rough endoplasmic reticulum - Golgi Apparatus - Vesicle - Cell membrane - Outside the cell37
11059807618Cellular level of OrganizationCell - Tissue - Organ - Organ system - Organism38
11059807619hypotonic solution"below strength"; will result in water moving into the cell39
11059807620hypertonic solution"above strength"; will result in water moving out of the cell40
11080538510cilia and flagellahair-like structures that extend from the surface of the cell, where they assist in movement. Made of microtubules arranged in a "9+2" pattern41
11081169729selectively permeable membranea membrane that allows only certain substances to pass through it42
11081500301facilitated diffusionDiffusion of specific molecules across cell membranes through specialized protein channels43
11081526600Aquaporinschannel proteins that facilitate the passage of water across the cell membrane44
11081582818isotonic solutiona solution whose solute concentration is equal to the solute concentration inside a cell45
11081629757active transportEnergy-requiring process that moves material across a cell membrane against a concentration difference46
11081662597endocytosisprocess by which a cell takes material into the cell by infoldings or pockets of the cell membrane that engulf the material and move it into the cell47
11081689559Exocytosisa process by which the contents of a cell vacuole are released out of the cell through fusion of the vacuole membrane with the cell membrane.48
11328170393nuclear membranecontrols movement of materials in and out of the nucleus49
11328188406centriolesLocated near the nucleus in animal cells; involved in cell division50
11328207297cell plateA double membrane across the midline of a dividing plant cell, between which the new cell wall forms during cytokinesis (cell division)51

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