Science
Movement of substances across the cell membrane
In this Class 9 Science topic from “Cell: The Building Block of Life,” students learn how substances move across the cell membrane to maintain cellular balance. The topic explains diffusion, osmosis, and active transport, including the role of concentration gradients, water movement, and energy use. Students also connect these processes with examples such as oxygen entering cells, carbon dioxide leaving them, and water absorption by plant cells.
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Practice questions are not available for this topic yet. We plan to add questions with clear explanations soon. You can keep practising other topics in the meantime.
- Class / subject
- 9 · Science
- Chapter
- Cell: The Building Block of Life
- Topic
- Movement of substances across the cell membrane
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