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Bio111Estructura Celular
Tamao y Diversidad celular
Relacin superficie a volumen
Microscopa de luz y electrnica
Fraccionamiento celular
Diversidad de la Vida
Tipos de clulasProcariota
Eucariota
BacteriaOrganismos Procariotas
Fig. 4-6, p. 81Plasmamembrane0.5 mPiliStorage granuleFlagellumRibosomeCell wallCapsuleNuclearareaDNA
9Figure 4.6: Structure of a prokaryotic cell. This colorized TEM shows a thin lengthwise slice through an Escherichia coli bacterium. Note the prominent nuclear area containing the genetic material (DNA). E. coli is a normal inhabitant of the human intestine, but under certain conditions some strains can cause infections.
Clula Eucariota
Fig. 4-3b, p. 77
11Figure 4.3: Viewing cells with various types of microscopes.The specimen visualized in (b) through (f) is a Paramecium (a protist). (a) Using a crude microscope that he constructed, Robert Hooke looked at a thin slice of cork and drew what he saw. More sophisticated microscopes and techniques enable biologists to view cells in more detail. Bright-field microscopy can be enhanced by staining. The phase contrast and differential-interference-contrast microscopes enhance detail by increasing the differences in optical density in different regions of the cells.
Diagrama declula animal
Clula Eucariota animal
Diagrama deClula vegetal
Clula eucariota vegetal
Fig. 4-7, p. 82RibosomesChloroplastGranumStromaSmooth ERRough and smooth endoplasmic reticulum (ER)ChromatinNuclear poresNuclear envelopeNucleolusNucleusRough ERMitochondrionVacuolePlasma membraneCell wallMembranoussacsGolgi complexCristae
16Figure 4.7: Composite diagram of a plant cell.Chloroplasts, a cell wall, and prominent vacuoles are characteristic of plant cells. The TEMs show specific structures or areas of the cell. Some plant cells do not have all the organelles shown here. For example, leaf and stem cells that carry on photosynthesis contain chloroplasts, whereas root cells do not. Many of the organelles, such as the nucleus, mitochondria, and endoplasmic reticulum (ER), are characteristic of all eukaryotic cells.
Fig. 4-8, p. 83LysosomeRibosomesRoughERSmooth ERCentriolesMitochondrionRough and smoothendoplastic reticulum (ER)NuclearenvelopeNucleolusNucleusChromatinNuclearporesNuclearenvelopeMembranoussacs ofGolgiGolgi complexPlasmamembraneCristae
17Figure 4.8: Composite diagram of an animal cell. This generalized animal cell is shown in a realistic context surrounded by adjacent cells, which cause it to be slightly compressed. The TEMs show the structure of various organelles. Depending on the cell type, certain organelles may be more or less prominent.
El ncleo
Retculo Endoplsmico
Fig. 4-13, p. 910.5 mGolgi complextransfacecisface
Cuerpo de Golgie
20Figure 4.13: TEM and an interpretive drawing of the Golgi complex.
Cuerpos de Golgi
Fig. 4-14, p. 92transfacePlasmamembraneGlycoproteinRough ERRibosomesPolypeptides synthesizedon ribosomes are insertedinto ER lumen.Sugars are added, forming glycoproteins.Transport vesicles deliver glycoproteins to cis face of Golgi.Glycoproteins modifiedfurther in Golgi.Glycoproteins move to transface where they are packagedin transport vesicles.Glycoproteins transported toplasma membrane (or otherorganelle).Contents of transport vesiclereleased from cell.Golgi complexcisface
22Figure 4.14: Protein transport within the cell. Glycoproteins are transported from ribosomes into the ER. They are then transported to the Golgi complex, where they are modified. This diagram shows the passage of glycoproteins through compartments of the endomembrane system of a mucus-secreting goblet cell that lines the intestine. Mucus consists of a complex mixture of covalently linked proteins and carbohydrates.
Lisosomas(cel. animal)
Fig. 4-16, p. 93
15 mFood vacuoles containing diatoms
24Figure 4.16: LM of food vacuoles. This protist, Chilodonella, has ingested many small, photosynthetic protists called diatoms (dark areas) that have been enclosed in food vacuoles. From the number of diatoms scattered about its cell, one might conclude that Chilodonella has a rather voracious appetite.
Organelos de transformacin de Energa
Mitocondria
Cloroplastidio
Fig. 4-9b, p. 84StarchgrainIntercellular spaceChloroplastsCell wallVacuoleProlamellar bodyPlasmamembraneGolgi complexRibosomesRoughendoplasmicreticulumNucleus
28Figure 4.9: TEM of a plant cell and an interpretive drawing. Most of this cross section of a cell from the leaf of a young bean plant (Phaseolus vulgaris) is dominated by a vacuole. Prolamellar bodies are membranous regions typically seen in developing chloroplasts.
Citoesqueleto
ElCitoesqueleto
Fig. 4-21, p. 97MicrotubulePlasmamembraneMicrofilamentIntermediatefilament
32Figure 4.21: The cytoskeleton. Eukaryotic cells have a cytoskeleton consisting of networks of several types of fibers, including microtubules, microfilaments, and intermediate filaments. The cytoskeleton contributes to the shape of the cell, anchors organelles, and sometimes rapidly changes shape during cell locomotion. The cytoskeleton of two fibroblast cells is visible in the fluorescent light micrograph (microtubules, yellow; microfilaments, blue; nuclei, green).
Estructurade los cilios
Fig. 4-22b, p. 98
(b) Fluorescent LM showing microtubules in green. Amicrotubule-organizing center (pink dot) is visible besideor over most of the cell nuclei (blue).50 m
35Figure 4.22: Organization of microtubules.
Fig. 4-27b, p. 101
(b) Intermediate filaments are stained green inthis human cell isolated from a tissue culture.100 m
36Figure 4.27: Intermediate filaments.
Matriz extracelular
Fig. 4-28, p. 102PlasmamembraneCollagenFibronectinsIntegrinIntermediatefilamentMicrofilamentsExtracellularmatrixCytosol
38Figure 4.28: The extracellular matrix (ECM). Fibronectins, glycoproteins of the ECM, bind to integrins and other receptors in the plasma membrane.
ParedEn clulas vegetales
http://www.wisc-online.com/objects/index_tj.asp?objid=AP1101
Para construir la Membrana Celular
h T tp://www.youtube.com/watch?v=u3cgxfxVc6E&feature=youtube_gdata_player
http://zoology.okstate.edu/zoo_lrc/biol1114/tutorials/Flash/Osmosis_Animation.htm
Animaciones de smosishttp://www2.nl.edu/jste/osmosis.htm#Osmosis
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