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Chapter 6 AP BIO: A Tour of the Cell Flashcards

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3007910808CellsMakes up all organisms.0
3007921913Neuron StructuresAllows transmissions, longest nerves in the body; controls sensory aspects.1
3007928018Basic Structure and Functional UnitBasic unit of every organism is one of the two types of cells: Eukaryotic or Prokaryotic.2
3007939702Basic Features of All CellsAll cells will include: cytosol, plasma membrane, chromosomes (genes), ribosomes (proteins), and phospholipids.3
3007946765Prokaryotic (Features / Characterization)A prokaryotic cell has: no nucleus, DNA is in a unbound region:nucleoid, no membrane-bound organelle, and has cytoplasm.4
3007956400Eukaryotic (Features / Characterization)Characterized by having: DNA in the nucleus bound by membraneous nucleus envelope, and membrane bound organelles. Typically larger cell.5
3007972117Plasma MembraneSelective barrier allowing passage of oxygen, nutrients, and waste. All in an effort to service the cell. The general layer of a biological membrane is a double layer of phospholipids.6
3007989327Surface AreaThe Surface area to Volume ratio is critical, Surface area increases by n^2 and Volume increases by n^3.7
3007993503NucleusContains most of the cell's genes. Nuclear envelope is such that encloses nucleus from cytoplasm. -Nucleolus is located within the nucleus; site of RNA synthesis.8
3008003496Nuclear EnvelopeEncloses nucleus, is also a double membrane consisting of many lipid bilayers allowing pores to secrete molecules in and out from the nucleus.9
3008008048ChromatinFormed through combining of Gene's and Proteins. Condenses to form "discrete" chromosomes.10
3008019174RibosomesParticles made of ribosomal RNA and protein. Carries out protein synthesis in: Cytosol (free) or outside of the ER or nuclear envelope (bound).11
3008025719Endomembrane SystemAll components are either continuous of connected thru vesicles. Components: -Nucleus Envelope -ER (Endoplasmic reticulum) -Golgi apparatus -Lysosomes -Vacuoles -Plasma Membrane12
3008058476Endoplasmic Reticulum (Smooth / Rough ER)Accounts for more than half of the total membrane in eukaryotic cells. Two regions of the ER: -Smooth ER: Lacks ribosomes -Rough ER: Ribosomes studing the surface13
3008066950Smooth Endoplasmic Reticulum (Smooth ER)Function: -Synthesizes lipids -Metabolizes carbohydrates -Detoxification of poison -Stores calcium14
3008087792Rough Endoplasmic Reticulum (Rough ER)-Has bound ribosomes which secrete glycoproteins (proteins covalently bonded to a carb) -Distributes vesicles -Membrane factory for the cell15
3008107314Transport VesicleTransportation cell, proteins surrounded by membranes. A tiny membranous sac in a cell's cytoplasm carrying molecules produced by the cell.16
3008313974VesicleA sac made of membrane in the cytoplasm.17
3008113397Golgi ApparatusFunctions: -Modifies products of the ER -Manafactures certain macromolecules -Sorts + Packages materials into vesicles.18
3008119063LysosomeMembraneous sac of hydrolytic enzymes which allows digestability of macromolecules. Created by the Golgi apparatus. Lysosomal enzymes can hydrolyze proteins, fats, polysaccharides, and nucleic acids.19
3008124497PhagocytosisFormation of a food vacuole through a cell engulfing another. Then a Lysosome fuses with the food vacuole digesting the molecules. Lysosomes also use enzymes to recycle a cell's own organelles and macromolecules thru a process called autophagy.20
3008138782Vacuoles (Food, Contractile, Central)Plants and Fungal Cells contain several (or one) vacuoles. Contractile: Found in freshwater protists; pumps excess water out of cells Central: Found in mature plant cells, holds organic compounds and water.21
3008153871MitochondriaSite of cellular respiration (metabolic process forming ATP), known as the power house of the cell)22
3008158009ChloroplastsFound in plants and algae; site(s) of photosynthesis. -Member of plastids.23
3008162952Mitochondria & Chloroplasts-Not part of the endomembrane system -double membrane -have proteins made by free ribosomes -have own DNA24
3008165929PeroxisomesOxidative organelles specialized in metabolic compartments. Produces hydrogen peroxide and converts it to water, uses Oxygen to break molecules.25
3008176392CytoskeletonNetwork of fibers extending throughout the cytoplasm, organizes the cell's structure and activities. Has interactions with motor proteins to produce motility. "Cell Anchor" 3 Molecular structures: microtubules, microfilaments, intermediate filaments.26
3008189998MicrotubulesThickest of the three, helps with the transportation of cells and controls the beating of flagella and cilia. Helps with maintenance of cell shape and chromosome movements as well as organelle movement.27
3008192627Microfilaments (actin filaments)The thinnest component containing myosin and actin. Helps changes in cell shape, muscle contraction, motility, and cell division. Solid rods about 7nm built as a twisted double chain of actin.28
3008197161Intermediate FilamentsFibers with diameters in the "middle range". Helps maintain shape, anchorage of nucleus, formation of nuclear lamina. Ranges in diameter from 8-12 nanometers29
3008207780CentrosomesMicrotubules grow out of centrosomes near the nucleus; "the microtubule-organizing center." Has 9 triplets of microtubules arranged in a range for animal cells with pairs of centrioles.30
3008216861CiliaHelps move things along a surface, kinda like capillary actions, such as the fallopian tubes and mucus elevator.31
3008224979FlagellaPropells cell forward completely, such as the trachia and sperm.32
3008234096ActinA globular protein that links into chains, two of which twist helically about each other, forming microfilaments (actin filaments) in muscle and other kinds of cells.33
3008244814Cytoplasmic StreamingCircular flow of cytoplasm within cells, speeds distribution of materials within cells. In plants cells: Actin-myosin interactions and sol-gel drive cytoplasmic streaming.34
3008270020Pseudopodia (Cellular extensions)Extends and contracts through reversibly assembly and contraction of actin subunits into microfilaments.35
3008250852Cell Wall of PlantsExtracellular structure distinguishing plant cells from animal cells. Protects the cell, maintains shape, and prevents excessive uptade of water. Typically 3 multiple layers.36
3008258557Primary Cell WallRelatively thin and flexible.37
3008259999Middle LamellaThin layer between primary walls of adjacent cells.38
3008261295Secondary Cell Wall (In some cells)Added between the plasma membrane and primary cell wall.39
3008263587PlasmodesmataChannels perforating cell walls, so water can travel from cell to cell; Channels between adjacent cells. Water and small solutes can pass from cell to cell thru Plasmodesmata.40
3008274213Extracellular Matrix (ECM)Made up of glycoproteins such as: Collagen, Proteoglycans, and Fibronectin. ECM proteins bind to receptor proteins in the plasma membrane called integrins. Function: -Support -Adhesion -Movement -Regulation41
3008280120Intercellular JunctionsFacilitates contact between neighboring cells (communication); several types of intercellular junctions. Ex. -Plasmodesmata -Tight junctions -Desmosomes -Gap junctions42
3008288835Tight JunctionsMembranes of neighboring cells press together to prevent leakage of extracellular fluid.43
3008291348Desmosomes (anchoring junctions)Fasten cells into strong sheets44
3008292975Gap Junctions (Communicating junctions)Provides cytoplasmic channels between adjacent cells.45

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