Plant Cell Osmosis Lab Mrs. Stewart Biology.

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Presentation transcript:

Plant Cell Osmosis Lab Mrs. Stewart Biology

Bell Work Pick up Plant Cell Osmosis Lab Packet – ONE for each set of shoulder partners

Objectives Predict the movement of water when a cell is placed in environments with varying solute concentrations Recognize the importance of homeostasis as a survival mechanism

Background Hypotonic solution Hypertonic solution Isotonic Solution Water moves into the cell Hypertonic solution Water moves out of the cell Isotonic Solution Water is moving at equilibrium

Vocabulary Turgid = swollen/distended with water (occurs in a hypotonic solution) Turgor Pressure = pressure exerted on a cell wall due to the cell becoming turgid. Plasmolysis = the shrinking of the cytoplasm due to loss of water in a hypertonic solution. Cell membraned pulls away from cell wall

Step One: Draw ONE onion cell Draw how much purple fills the cell

Tap Water: ONE onion cell Draw how much purple fills the cell now Did it change?

Plasmolysis in Salt Water Draw how much purple fills the cell now. What happened?

Turgor Pressure in Distilled Water Draw how much purple fills the cell now. What happened?

Analysis Questions: Complete questions 1 – 7 20 minutes