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Zellorganellen
Bio Referat von Osman
Themenübersicht:
-Vesikel
-Lysosomen
-Membranfluss
-Vakuolen
-Peroxisomen
Vesikel:
-Zellorganellen
-Membranumhüllte Bläschen
-Zwei Arten von Vesikel
Exocytose  speichern Stoffe, die aus
der Zelle raus müssen
Endocytose  nehmen brauchbare Stoffe
von der Zellmembran auf
und bringen die in die Zelle
- Sie könnnen von Endoplasmatische Retikulum abgeschürt
werden und zu neuem GOLGI-Zisternen verschmelzen
Lysosomen:
-bläschenförmige Strukturen
-Verdauungsorganellen der Zelle
enthalten insgesamt 40 hydrolytische
Enzyme, die Eiweißstoffe, Nucleinsäure,
Lipide oder Polysaccharide spalten
-Verdauen zelleignes und zellfremdes, um
Bausteine der Zelle neue Synthesen zugänglich zu machen
-Enzyme für den Aufbau der Makromoleküle
Lysosomen:
- beim tot geben sie ihre Enzyme nach außen ab,
sodass es sich selbst verdaut
- Abbauprodukte werden vom Nachbarzellen wieder
verwendet
- Pflanzenzellen haben keine Lysosomen Vakuolen sind dafür
zuständig
Membranfluss:
-Keine starren Strukturen vorhanden
dynamisches System  durch den Austausch von Vesikel
-In Pflanzliche Zellen können ER-Versikel auch in
Vakuolenmembran enthalten sein und die Inhalte
in die Vakuole abgeben
Vakuolen:
-sind große Vesikel, zur hilfe Verdauung von Makromoleküle
-speichern Produkte des Zellstoffwechsels
-entstehen durch Endocytose oder die Fusion von Vesikel die vom ER
oder dem GOLGI-Apparat abgeschürrt werden
-Bestandteile des Inneren Membransystems
-Ausgewachsene Pflanzenzellen befindet sich große, zentral
gelegene Vakuole
Peroxisomen:
-Vesikel ähnliche Organellen, in verschiedene Zellen verschiedene
Funktion haben
-mit Enzymen bauen sie Fettsäuren und andere Substrate ab
-enthalten Katalase, die das entstehende Zellgift Wasserstoffperoxid
in Sauerstoff und Wasser zerlegt
-Alkohol und andere schädliche Verbindungen in Leberzellen zu entgiften
-Vermehrung durch Zellteilung

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2017_12_07_Zellorganellen.pptx

  • 3. Vesikel: -Zellorganellen -Membranumhüllte Bläschen -Zwei Arten von Vesikel Exocytose  speichern Stoffe, die aus der Zelle raus müssen Endocytose  nehmen brauchbare Stoffe von der Zellmembran auf und bringen die in die Zelle - Sie könnnen von Endoplasmatische Retikulum abgeschürt werden und zu neuem GOLGI-Zisternen verschmelzen
  • 4. Lysosomen: -bläschenförmige Strukturen -Verdauungsorganellen der Zelle enthalten insgesamt 40 hydrolytische Enzyme, die Eiweißstoffe, Nucleinsäure, Lipide oder Polysaccharide spalten -Verdauen zelleignes und zellfremdes, um Bausteine der Zelle neue Synthesen zugänglich zu machen -Enzyme für den Aufbau der Makromoleküle
  • 5. Lysosomen: - beim tot geben sie ihre Enzyme nach außen ab, sodass es sich selbst verdaut - Abbauprodukte werden vom Nachbarzellen wieder verwendet - Pflanzenzellen haben keine Lysosomen Vakuolen sind dafür zuständig
  • 6. Membranfluss: -Keine starren Strukturen vorhanden dynamisches System  durch den Austausch von Vesikel -In Pflanzliche Zellen können ER-Versikel auch in Vakuolenmembran enthalten sein und die Inhalte in die Vakuole abgeben
  • 7. Vakuolen: -sind große Vesikel, zur hilfe Verdauung von Makromoleküle -speichern Produkte des Zellstoffwechsels -entstehen durch Endocytose oder die Fusion von Vesikel die vom ER oder dem GOLGI-Apparat abgeschürrt werden -Bestandteile des Inneren Membransystems -Ausgewachsene Pflanzenzellen befindet sich große, zentral gelegene Vakuole
  • 8. Peroxisomen: -Vesikel ähnliche Organellen, in verschiedene Zellen verschiedene Funktion haben -mit Enzymen bauen sie Fettsäuren und andere Substrate ab -enthalten Katalase, die das entstehende Zellgift Wasserstoffperoxid in Sauerstoff und Wasser zerlegt -Alkohol und andere schädliche Verbindungen in Leberzellen zu entgiften -Vermehrung durch Zellteilung