The membrane is picky. It allows small molecules like water to slip through but blocks larger "solutes" like salt or sugar.
| Solution Type | Animal Cell Reaction | Plant Cell Reaction | | :--- | :--- | :--- | | | Normal shape. | Flaccid (limp). The plant may wilt because it lacks turgor pressure. | | Hypotonic | Cytolysis (Bursting): The cell swells and may pop (lyse) because it has no cell wall. | Turgid (Firm): The cell wall prevents bursting. This is ideal for plants (creates turgor pressure). | | Hypertonic | Crenation (Shriveling): The cell shrinks and looks spiky. | Plasmolysis: The cytoplasm shrinks away from the cell wall. The plant wilts and may die. | osmosis doodle notes answer key