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Tour of the Cell Flashcards

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9068088213Light Microscopelight passes through the specimen then through glass lense0
9068096220Organellesmembrane in eukaryotic cells1
9068101678Electron Microscopefocuses a beam of electrons through a specimen/surface -> the preparation kill the cells2
9068110475Scanning Electron Microscopedetailed study of specimens ->usually covered in a thin layer of gold ->preparation kills the cells3
9068116333Transmission Electron Microscopestudies the internal structure of cells ->stained with atoms of heavy metals -preparation usually kills the cells4
9068136009Cell Fractionationthe separation of cells major organelles ->observation of sub cellular of cells -> usage of a centrifuge5
9068164441Cytosolplasma membrane within cells (jelly like substance) ->contains chromosomes ->Genes from DNA6
9068198704Ribosomescurates proteins ->recieves information from DNA/genes to produce proteins7
9068151216Eukaryotic CellsDNA located in the nucleus ->bounded by double membrane ->human cells, plant cells8
9068158027Prokaryotic CellsDNA is NOT residing with a membrane -> floating within cytoplasm -> Bacteria9
9068217781Nucleoidwhere DNA is suspended in a Prokaryotic cells10
9068228157Plasma Membraneselective barriers only allow oxygen and nutrients ->waste exit the cells -this can only happen wit small cells11
9068313342Surface Area to Volume Sizecrucial to sustaining cell permeability ->materials can exit and enter the cells easily -> keep cells small and elongated12
9068360429Nucleuscontains most of the genes in a eukaryotic cell -> genes located in mitochondria (animal cells) -> genes located in chloroplast (plant cells)13
9068370532Nuclear Envolopewrapped around the nucleus -> separates its contents from the cytoplasm ->double membrane (bilayer lipids)14
9068384988Nuclear laminaregulates DNA replications and cell division ->supports the nuclear envelope ->lining inside the nuclear envolope15
9068398302Chromosomescarry genetic infromation ->each carries DNA molecules (contains many proteins) ->proteins help with the coiling of DNA16
9068405577Chromatinchromosomes are made up of this -> made of proteins, DNA, and RNA17
9070735348Nucleoluslargest structure within the nucleous ->RNA is formed there ->proteins from the cytoplasm are synthesized into rRNA (into ribosomes)18
9070765745Ribsomesmade of rRNA and protein ->not an organelle or membrane bound ->protein synthesis19
9070785027Endoplasmic Reticulmthe protruding part of the nucleus ->looks like a net20
9070790585Smooth ERNO ribosomes on the outer surface -> creates lipids, proteins, steriods (sex hormon`es), new phospholids ->detoxifies drugs and poisons ->stores calcium21
9070793547Rough ERhas ribosomes on the surface ->synthesize protein insulin ->grows in place by adding membrane proteins and phospholipids22
9070824218Glycoproteinsproteins covalently bounded to carbohydrates23
9070832182Transport Vesiclesvesicles created from ER traveling to another part of the cell24
9070867688Golgi Apparatus->recieivng, sorting, and packaging center ->marcomolecules produced there //stores materials ->transport vesicles are sent there ->folds are called "cisternae" //cis-side recieves //trans-side ships25
9070902243Lysosomesac that contains hydrolytic enzymes eukaryotic cells used to digest (marcomolecules) ->made by Rough ER (transferred to Golgi)26
9070917083Phagocytosislysosomes in unicellular organisms help in the aid of intercellular digestion -> engulfing smaller particles or food particles //Macrophages ; white blood cells engulf and destroy bacteria27
9071017330Autophagylysosomes use their hydrolytic enzymes to recycle cells organic material ->damaged organelles or small traces of cytosol are surrounded by double membranes ->lysosomal enzymes dismantle the material and release it into the cytosol for reuse28
9071040009Vacuoleslarge vesicles from the ER and golgi ->selective in the solution it transports ->solution differs from the cytosol29
9071052108Food Vacuolesformed by phagocytosis30
9071125013Contractile Vacuolespump excess water out of unicellular eukaryotics -> maintain an isotonic environment31
9071152955Central Vacuole->found in plant cells ->holds materials and waste ->keeps plant cell structure //provides support as the plant grows32
9071235595Mitochondriasite of cellular respiration ->living cells ->uses oxygen to curate ATP //extracts energy from sugars, fats, and other fuel33
9071278757Chloroplastsfound in plants and algae ->conversation of solar energy to chemical energy by using sunlight ->uses it to derive sugar from carbon monoxide and water ->divided into 3 componets //Intermembrane //Stroma //Thylakoid34
9071291932Endosymbiont Theoryancestor of eukaryotic cells engulfed an oxygen-using nonphotosynthetic prokaryotic cell ->engulfed cell formed a relationship with the host cell ->cell living within another cell35
9071435423CristaeInner membrane of a mitochondria ->both membranes enclosing mitochondrion is phospholipid bilayer (with embedded proteins) ->outer membrane is smooth36
9071810499Mitochondrial Matrixinner foldings with the mitochondrial ->contains enzymes ->mitochondrial DNA -> ribosomes37
9071822501Thylakiodsflattened sacs within the chloroplasts ->stacked like poker chips38
9071845971Granumthylakiod stacks are each39
9071848343Stromafluid outside the thylakiods ->contains chloroplast DNA and ribosomes ->contains enzymes40
9071864437Plastidssmall organelles ->chloroplasts, ->in the cytoplasm of plant cells -> stores pigment or food (starch)41
9071875602Peroxisomesspecialized metabolic compartment ->contain enzymes that remove hydrogen atoms and transfer them to oxygen ->produces hydrogen peroxide ->enzyme coverts hydrogen peroxide to water42
9071914612Glyoxysomesfat storing tissues of plant seeds ->enzymes coverts fatty acids to sugar43
9071919958Cytoskeletonnetwork of fibers extending throughout the cytoplasm ->gives cells their shape44
9071931386Motor Proteinscarry cargo to their destination by walking along a track within the cytoskeleton ->convert chemical energy into mechanical work by the hydrolysis of ATP45
9071994971Microtublesall eukaryotic cells contain hollow rods structured from a protein called tubulin -> tubulin is a dimer (molecule made up of 2 polypetides (similar)) ->grow in length by adding dimers46
9072007493Centrosomesmicrotubles grow out of them ->located near the nucleus47
9072011332Centrioleswith the centrosomes (come in pairs) ->each has 9 triple microtubles in a ring48
9072017731Flagella/Ciliaspecialized arragments of microtubles ->propel through fluids with the help of these //ie; sperm, lining within a uterus49
9072027298Basal Bodyan organelle that forms the base of a flagellum or cilium. ->the "motor" portion of the flagellum, embedded in the cytoplasmic membrane and wall50
9081412132DyneinsMovement of cilia and flagella ->Motor proteins ->Attached along each outer microtubule doublet and they use ATP for energy51
9081439683Microfilamentsthin, solid protein fibers that make up the cytoskeleton ->present in eukaryotic cells52
9081480093Actinbuilt from actin filaments ->globular protein ->contractile protein of muscle53
9081542508pseudopodiacells crawling along cellular extensions ->large, rounded cytoplasmic extensions that function both in movement and feeding54
9081589694Cytoplasmic Streamingcircular flow of cytoplasm within cells ->speeds the distribution of materials within a cell55
9081608076Intermediate Filamentslarger than the diameter of microfilaments ->SMALLER than microfilaments -> only found in the cells of some animals ->permenament, don't move like microtubules and microfiliaments -> give cells it's strength and shape56
9081662898Cell WallFound outside the cell membrane, made mostly of cellulose ->protects, shape, prevents excessive water uptake ->found in Prokaryotes, fungi, and *SOME* unicellular eukaryotes57
9081710569primary cell walla relatively thin and flexible layer in plant cells, first secreted by a young cell58
9081718029middle lamellaa thin layer between primary walls of adjacent cells that glues them together with pectin ->pectic is a thickening agent59
9081732225secondary cell wallcell matures and stops growing to strengthen its wall ->others add plasma membrane and primary wall resulting in a ->wood is completely made up of this60
9081780851Extracellular Matrixholds cell membranes together, protects and supports the plasma membrane ->made of glycoproteins, carbohydrate-> secreted by cells61
9081847917glycoproteinA protein with one or more carbohydrates covalently attached to it62
9081809009Collagenstrong fibers outside cells ->a protein -> main structural protein found in animal connective tissue, yielding gelatin when boiled.63
9081822350ProteoglycansConsists of small proteins and many carbohydrate chains ->Only found in animal cells.64
9081838395Fibronectinglycoprotein that helps animal cells attach to the extracellular matrix65
9081857513IntegrinsReceptor proteins in the plasma membrane -> translate signals between the ECM and the cytoskeleton ->integrate changes outside and inside the cell66
9081888561Tight JunctionMembranes of neighboring cells are pressed together, preventing leakage of extracellular fluid67
9081891388Desosomesprevent adjacent cells from separating during contractions68
9081895216Gap Junctionscommunicating junctions ->provide cytoplasmic channels between adjacent cells69

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