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Citoesquelet

Citoesquelet. Citoesquelet. Citoesquelet. Microtubule. LE 6-20. Microfilaments. 0.25 µm. Smooth ER. Reticle endoplasmàtic. Nuclear envelope. Rough ER. LE 6-12. ER lumen. Cisternae. Ribosomes. Transitional ER. Transport vesicle. 200 nm. Rough ER. Smooth ER. Ribosomes. ER.

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Citoesquelet

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  1. Citoesquelet

  2. Citoesquelet

  3. Citoesquelet Microtubule LE 6-20 Microfilaments 0.25 µm

  4. Smooth ER Reticle endoplasmàtic Nuclear envelope Rough ER LE 6-12 ER lumen Cisternae Ribosomes Transitional ER Transport vesicle 200 nm Rough ER Smooth ER

  5. Ribosomes ER Cytosol Endoplasmic reticulum (ER) LE 6-11 Free ribosomes Bound ribosomes Large subunit Small subunit 0.5 µm TEM showing ER and ribosomes Diagram of a ribosome

  6. Sistema de Golgi Golgi apparatus cis face (“receiving” side of Golgi apparatus) LE 6-13 Vesicles coalesce to form new cis Golgi cisternae Vesicles move from ER to Golgi 0.1 µm Vesicles also transport certain proteins back to ER Cisternae Cisternal maturation: Golgi cisternae move in a cis- to-trans direction Vesicles form and leave Golgi, carrying specific proteins to other locations or to the plasma mem- brane for secretion Vesicles transport specific proteins backward to newer Golgi cisternae trans face (“shipping” side of Golgi apparatus) TEM of Golgi apparatus

  7. Nucleus Rough ER LE 6-16-1 Smooth ER Nuclear envelope

  8. Mitocondris Mitochondrion Intermembrane space Outer membrane LE 6-17 Free ribosomes in the mitochondrial matrix Inner membrane Cristae Matrix Mitochondrial DNA 100 nm

  9. Nucleus Rough ER LE 6-16-2 Smooth ER Nuclear envelope cis Golgi Transport vesicle trans Golgi

  10. Nucleus Rough ER LE 6-16-3 Smooth ER Nuclear envelope cis Golgi Transport vesicle Plasma membrane trans Golgi

  11. 1 µm Nucleus LE 6-14a Lysosome Lysosome contains active hydrolytic enzymes Hydrolytic enzymes digest food particles Food vacuole fuses with lysosome Digestive enzymes Plasma membrane Lysosome Digestion Food vacuole Phagocytosis: lysosome digesting food

  12. Lysosome containing two damaged organelles 1 µm Mitochondrion fragment Peroxisome fragment LE 6-14b Hydrolytic enzymes digest organelle components Lysosome fuses with vesicle containing damaged organelle Lysosome Digestion Vesicle containing damaged mitochondrion Autophagy: lysosome breaking down damaged organelle

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