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Tour of the cell Flashcards

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5335254438Plasma Membrane (or cell membrane)a membrane of lipids and proteins that forms the external boundary of the cytoplasm of a cell or encloses a vacuole, and that regulates the passage of molecules in and out of the cytoplasm.0
5335254439CytoplasmThick solution that fills each cell and is enclosed by the cell membrane. It is mainly composed of water, salts, and proteins. In eukaryotic cells, the cytoplasm includes all of the material inside the cell and outside of the nucleus.1
5335254440Why are cells so small?Surface to volume ratio2
5335254441The bigger the cell is, the ________ there is per unitLess surface area3
5335254442Above a certain size in a cell, material cannot _____________Be moved in or out of of the cell fast enough4
5335254443Light microscopesLight is focused using glass lenses5
5335254445Limitations of light microscopyMagnification only up to 1000x6
5335254446Light microscopes can resolve objects down to about ________ in size200nm or 0.2 microns7
5335254447Electron microscopeInstead of light, electrons are used forming an imagine through a computer of how they are being absorbed.8
5335254448Disadvantage of electron MicroscopesSample preparation procedures require specimens to be dead9
5335254449Types of Electron MicroscopeTransmission Electron Microscope or Scanning Electron Microscope10
5335254450Scanning Electron MicroscopeCreates an image by reflection that looks 3D11
5335254451Transmission Electron MicroscopeCreates a high resolution "slice" image by passing a beam of electrons THROUGH a sample12
5335254452Function of cell membraneDivide cell into compartments13
5335254454Interacting membranes inside the cell form _______Endomembrane systems14
5335254455Cell membrane or Plasma Membrane is present in all cells, responsible forMaintaining a constant internal environment in cell cytoplasm15
5335254456Cell wall is ________ in animal cellsAbsent16
5335254457Main component of cell membranes isLipid Bilayers17
5335254458A lipid bilayer consists ofTwo layers of phospholipids18
5335254459This lipid bilayer gives the membrane its ___________Fluid properties19
5335254460Fluid Mosaic ModelA model that describes the cell membrane.20
5335254461Mosaic membrane is made up ofPhospholipids, Glycolipids, Sterols, proteins21
5335254462Most phospholipids and some proteins can _____ through memebraneDrift.22
5335254463Membrane Proteins consist ofAdhesion, Communication, Receptor and Recognition proteins.23
5335254464Prokaryotic Cells areBacterial and Archae24
5335254465In Prokaryotic Cells, DNA is ______ enclosed in the ______Not, Nucleus25
5335254466Highly organized membrane-enclosed organellesEukaryotic Cells26
5335254467Eukaryotic Cells haveCytoplasm and Nucleoplasm27
5335254468Archaea and EubacteriaProkaryotic Cells28
5335254469Plants, Animals, Protista, FungiEukaryotic Cells29
5335254470Nucleus is bounded byThe nuclear envelope30
5335254471Double membrane perforated with nuclear poresNuclear envelope31
5335254472The nuclear side of the envelope is lined with ___________The nuclear Lamina.32
5335254473The nuclear lamina is aNetlike array of protein filaments that maintain the shape of the nucleus,33
5335254474The cell nucleusContains DNA34
5335254475DNA forms _________Chromatin35
5335254476Chromatin is organized intoChromosomes36
5335254477Inside the NucleolousRibosomal RNA synthesis, Ribosomal subunit assembly37
5335254478Main component of cell membranes isLipid Bilayers38
5335254479Functions of NucleusKeeps DNA separated from machinery of cytoplasm39
5335254480Nuclear EnvelopeTwo outer membranes ( Lipid Bilayers)40
5335254481Innermost surface of Nuclear Envelope has ______ attachment sitesDNA41
5335254482Components of NucleusNuclear envelope, Nucleoplasm, Nucleolus, Chromatin42
5335254483Chromatin is the cells collection of ______ and associated _________DNA and proteins.43
5335254484Chromosome is one __________ and its associated proteinsDNA Molecule and associated proteins44
5335254485Chromatin appearance changes asCell divides.45
5335254486Dense mass of material is located inNucleus46
5335254487Cluster of DNA and proteins can be found inNucleolus47
5335254488Ribosomal subunits are manufactured byThe Nucleolus48
5335254489Subunits must pass through _____ _____ to reach Cytoplasm49
5335254490RibosomesCarry out protein synthesis50
5335254491Ribosomes are made out ofProteins and rRNA51
5335254492There are two types of ribosomes found in a cellFree and Bound ribosomes52
5335254493Free Ribosomes are found inThe cytoplam of the cell53
5335254494Bound Ribosomes are found inThe surface of the Endoplasmic Reticulum54
5335254495Endomembrane SystemAll of the membranes that interact with each other inside a cell.55
5335254496How products are sorted and shipped to various destinationsIn the membrane System56
5335254497Components of Endomembrane SystemEndoplasmic Reticulum, Golgi Bodies, Vesicles57
5335254498Vesicles consist ofLysosomes, Food Vacuoles, Contractile Vacuoles, Central Vacuoles58
5335254499Endoplasmic ReticulumFound in animal cells, two regions rough and smooth.59
5335254500Forms a network of tubules and vesicles which functions to transport proteins throughout a cellEndoplasmic Reticulum60
5335254501Smooth ERNo ribosomes, synthesis lipids and its important in detoxification61
5335254502Smoth ER of _______ inactivates wastes, drugsLiver62
5335254503In the Endoplasmic Reticulum we can findSmooth ER and Rough ER63
5335254504Oils, Phospholipids, Steroids, Cholesterol are found inSmooth ER64
5335254505For an alcoholic, the more you drink the more ______ ER will be produced inside the cellSmooth65
5335254506Stores calcium ionsSmooth ER66
5335254507Rough ER"Factory inside of a cell"67
5335254508Contains ribosomes, membrane factory for the cellRough ER68
5335254509Golgi BodiesPut finishing touches on proteins that arrive from ER69
5335254510Package finished material for shipment to final destinationsGolgi Bodies70
5335254511Golgi bodies or Golgi Apparatus are like" UPS" "Protein receiving center"71
5335254512VesiclesMembraneous sacs that move through the cytoplasm72
5335254513Examples of VesiclesLysosomes and Peroxisomes73
5335254514LysosomesBreak down worn out cell structures, bacteria and other substances74
5335254515PeroxisomesInvolved in lipid metabolism and detoxification75
5335254516A Vesicle that contains enzymes, also involved in oxidation to AcetaldehydePeroxisomes76
5335254517Central VacuolesFluid filled organelles that store amino acids, sugars and wastes.77
5335254518Stores molecules needed by the cell and isolates material that might be harmful to the cellCentral Vacuole78
5335254519As a cell grows, expansion of __________ as a result of fluid pressure forces cell wall to expandVacuole79
5335254520MitochondriaPowerhouse that generates ATP energy80
5335254521Mitochondria sites _______ respirationAerobic81
5335254522Mitochondrial StructureDouble membrane. Outer membrane faces cytoplasm82
5335254523Plays important role inApoptosis83
5335254524ChoroplastsOnly found in plants and converts sunlight energy to ATP through photosynthesis84
5335254525Inner membrane of chloroplasts encloses the ________Stroma85
5335254526During photosynthesis, ChlorophyllTraps light energy86
5335254527Structure of a ChloroplastTwo outer membranes around semifluid interior (stroma)87
5335254528StromaFluid found inside Chroloplast88
5335254529Thylakoids3rd stack layer which contains chlorophylls89
5335254530GranumOne stack of Thylakoids90
5335254531Both Mitochondria and Chloroplasts resemble and might have evolved fromBacteria91
5335254532Mitochondria and Chloroplasts have their own ____, ____ and _____DNA, RNA and Ribosomes92
5335254533CytoskleletonSkeleton of the cell, found in the cytoplasm in all eukaryotic cells93
5335254534Basis for cell shape and internal organizationCytoskeleton94
5335254535Cytoskeleton is made up ofMicrotubules, Microfilaments, Intermediate filaments95
5335254536MicrotubulesLargest elements composed of protein tubulin in the Cytoskeleton96
5335254537Microtubules arise from ______MTOC's (microtubule organizing centers)97
5335254538Microfilaments arePolar or Dynamic98
5335254539Intermediate FilamentsPresent only in animal cells of certain tissues99
53352545406 known groups of Intermediate FilamentsDesmins, Vimentins, Lamins, Etc.100
5335254541Flagella and CiliaStructures for cell motility101
5335254542Thin, movable structures that function in movementCilia and Flagella102
5335254543Some free living cells, such as amoebas form _____False Feet103
5335254544These temporary, irregular lobes project from the cell and function inLocomotion and prey capture104
5335254545False feet is also known asPseudopods105
5335254546Pseudopods move asMicrofilaments106
5335254547Cell wallStructural component that wraps around plasma membrane found in plants, some fungi and protista107
5335254548Plant CuticleWx film covering cell surface, semi transparent and restricts water loss.108
5335254549The extracellular matrix (ECM) of animals is made up ofProteins, Carbohydrates, Collagen109
5335254550GlycocalyxCell coat covering outside of prokaryotic and eukaryotic cells after plasma membrane.110
5335254551Cell JunctionsConnects cells to other cells111
5335254552Tight JunctionsGlued together tightly that substances cannot leak. (bladder, intestines,kidneys)112
5335254553DesmosomesConnections not completely tight together, things can flow between them the cells (skin, intestines)113
5335254554Gap JunctionsCommunication tunnel junctions between two cells. Found in tissues that spread action potential ( Cardiac muscles)114
5335254555Adhering JunctionsKeeping things from slipping/sliding out of cell115

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