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Vacuole

Vacuole. By Kurt Smetana Period 2. Types of Vacuoles. Food Vacuoles - formed by phagocytosis Tractile Vacuoles - pumps excess water out of the cell. Central Vacuoles - enclosed by a membrane called tonoplast. Functions of Vacuoles.

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Vacuole

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  1. Vacuole By Kurt Smetana Period 2

  2. Types of Vacuoles • Food Vacuoles - formed by phagocytosis • Tractile Vacuoles - pumps excess water out of the cell. • Central Vacuoles - enclosed by a membrane called tonoplast.

  3. Functions of Vacuoles • Place to store organic compounds, such as proteins stockpiled in vacuoles of storage cells in seeds. • Plant cell’s main repository of inorganic ions, such as potassium and chloride. • Functions as plant cell’s lysosomal compartment • Disposal sites for metabolic by-products that would be dangerous in cytoplasm

  4. More Functions • Help protect the plant against predators because they contains poisonous or unpalatable compounds. • Elongates to absorb water, allowing the plant cell to become larger with a minimal investment in new cytoplasm.

  5. Creation of Vacuoles • Developed by coalescence of smaller vacuoles. • These are derived from the endoplasmic reticulum and Golgi apparatus.

  6. Other Important Facts • Is an integral part of the endomembrane system. • Only appears in plant cells. • Some are enriched in pigments that color the cells. • Like vesicles, Vacuoles are membrane-enclosed sacs within the cell.

  7. Questions • What is the name of the membrane that is around a central vacuole? A. Tonoplast B. Endoplasmic Recticulum C. Golgi Apparatus • Vacuoles are found in… A. The interior of animal cells B. The interior of plant cells C. The cells inside a cow’s intestine

  8. Questions • The three types of Vacuoles are… A. Food, Tractile, Phagocytosis B. Tractile, Central, Organic C. Food, Tractile, Central

  9. THE END.

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