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Vacuoles

Vacuoles. Jocelyn Sickler Ryan Yashinski. Vacuoles. Vacuole Structure. Simple structure Enclosed by a membrane that separates the content of the vacuole from the cytoplasm and helps maintain the pH (slightly acidic) of the cell by being selectively permeable Called tonoplast in plants

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Vacuoles

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  1. Vacuoles Jocelyn Sickler Ryan Yashinski

  2. Vacuoles

  3. Vacuole Structure • Simple structure • Enclosed by a membrane that separates the content of the vacuole from the cytoplasm and helps maintain the pH (slightly acidic) of the cell by being selectively permeable • Calledtonoplastin plants • Fluid inside the membrane contains nutrients and waste products • Do not have a specific size or shape • Related to vesicles which are other membrane-bound sacs found within the cell

  4. Central Vacuole • Structure: • Only one central vacuole • Take up a large amount of space and is formed by the fusion of many membrane vesicles (tonoplast) • Functions: • Storage • The fluid inside the central vacuole, called cell sap, store organic compounds such as proteins and digestive enzymes and inorganic ions, such as potassium and chloride. • Used as a disposal site for by-products that could damage the cell. • Contain pigments that color the cell • Aid in plant growth by absorbing water • Supports the structure of leaves and flowers • Other:Only found in plant cells

  5. Contractile Vacuole • Structure: Membrane-bound sac that enlarges with the accumulation of fluid • Function: Pump excess water out of the cell • Other: Usually found in freshwater protozoa and metazoans, such as sponges and hydra

  6. Food Vacuole • Structure: Same as contractile • Function: Digests food • Other: Found in animals

  7. Quiz • 1. What is the pH of vacuoles? Slightly Basic Neutral Slightly Acidic Strongly Acidic

  8. Quiz • 2. Which of the following is not a vacuole? A. Food Vacuole B. Contractile Vacuole C. Primary Vacuole D. Central Vacuole

  9. Quiz • 3. A central vacuole is found in…? A. Animal cells B. Bacteria C. Plant cells D. A, B, and C

  10. Quiz • 4. What does a contractile vacuole dispose of from the proximity of the cell? A. Enzymes B. Water C. Carbon Dioxide D. Hydrogen

  11. Quiz • 5. What is the fluid within a central vacuole? A. The Juice B. Water C. Cytoplasm D. Cell sap

  12. YES!!! Good Job! Next…

  13. Wrong! F.A.I.L. Try again!

  14. The End! • Questions, comments, or otherwise?

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