1.4 - Membrane transport
Assessment statements
| DCS Topic Code | Statement | Guidance |
| 1.4.U1 | Particles move across membranes by simple diffusion, facilitated diffusion, osmosis and active transport. | |
| 1.4.U2 | The fluidity of membranes allows materials to be taken into cells by endocytosis or released by exocytosis. Vesicles move materials within cells. | |
| 1.4.U3 | Vesicles move materials within cells. | |
| 1.4.A1 | Structure and function of sodium–potassium pumps for active transport and potassium channels for facilitated diffusion in axons. | |
| 1.4.A2 | Tissues or organs to be used in medical procedures must be bathed in a solution with the same osmolarity as the cytoplasm to prevent osmosis. | |
| 1.4.S1 | Estimation of osmolarity in tissues by bathing samples in hypotonic and hypertonic solutions. (Practical 2) | Osmosis experiments are a useful opportunity to stress the need for accurate mass and volume measurements in scientific experiments. |
Lesson 1
Labs
- Agar diffusion
- Changing the temperature of a leaf
- Potato osmosis
Data-based questions
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Lesson 2
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Review Lecture
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