Cell Structure and Function. Cell compartmentalization.

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Transcript of Cell Structure and Function. Cell compartmentalization.

  • Cell Structure and Function

  • Cell compartmentalization

  • Organelle jigsawNucleusRibosomesSmooth ERRough ERGolgi apparatusLysosomesVacuoles

  • Cytoskeleton - structureNetwork of fibers extended throughout the cytoplasmFLEXIBLE!

  • Cytoskeleton functionMechanical supportMaintain shape (animal cells)Anchors organelles and moleculesMotilityMoves entire cellsMoves part of the cellMotor proteins needed (whole cell, cilia, flagella, muscle contraction, vesicle movement)Signal transduction

  • Cytoskeleton components

  • Microtubules - Centrioles9 sets of 3

  • Microtubules - Cilia and Flagella

  • Microtubules - Cilia and Flagella

  • Microfilaments

  • Plant cell wallCell protection, shape maintenance, prevents water uptakeFound in some prokaryotes, protists, and fungiCellulose + other polysaccharides

  • Extracellular Matrix

  • Carbohydrate functions

  • Intercellular junctions

  • Cell membrane structure

  • Protein functions

  • Membrane permeabilityIs the cell membrane permeable toHydrophobic (nonpolar) moleculesIonsPolar moleculesSmall versus large moleculesAquaporins

  • Lab 1: Diffusion & OsmosisConceptssemi-permeable membranediffusionosmosissolutionshypotonichypertonicisotonicwater potential

  • Diffusion vs. osmosis

  • Lab 1: Diffusion & Osmosis

  • Tonicity

  • Water potential (KNOW THIS WELL!): Water potential (in MPa)Always higher to lower s : solute potential (osmotic potential) Always (-)p : Pressure potential (+ or -)Animal cells: = s (Plant cells: = s + p

  • Facilitated diffusion

  • Active transport

  • Cotransport

  • Sodium-Potassium Pump

  • Endocytosis and exocytosis

  • Reading quizPage 140, problems 6-10

  • Review of chromosome vs. chromatid

  • Cell cycle

  • Mitotic spindle

  • Cytokinesis

  • Cell cycle control

  • Cell cycle control

  • Cancer growth