Topic: Active Transport
Lesson 1: Understanding Active Transport
| Section | Details |
|---|---|
| Objective | – Describe active transport as the movement of particles through a cell membrane from a region of lower concentration to a region of higher concentration, using energy from respiration. |
| Activities | Starter (5 mins): Show a simple animation of particles moving against a concentration gradient and ask students how this differs from diffusion. Main (25 mins): 1. Define active transport and compare it to diffusion and osmosis. 2. Explain that active transport requires energy from respiration to move particles against a concentration gradient. 3. Use an example, such as mineral ion uptake by root hair cells, to illustrate the concept. Plenary (10 mins): Students summarize active transport in one sentence and provide an example. |
| Resources | Animation of active transport, diagrams showing movement of particles across membranes. |
| Time | 40 minutes |
| Homework | Write a paragraph comparing active transport, diffusion, and osmosis. |
| Assessment | Students correctly describe active transport and provide examples during class discussions. |
| Past Paper Practice | IGCSE Biology 0610/22/M/J/19 Q3(a). |
Lesson 2: Importance of Active Transport
| Section | Details |
|---|---|
| Objective | – Explain the importance of active transport for the movement of molecules or ions across membranes, including ion uptake by root hairs. |
| Activities | Starter (5 mins): Show an image of a root hair cell and ask students how it absorbs minerals from the soil. Main (25 mins): 1. Discuss how active transport enables plants to absorb mineral ions like nitrates and potassium from soil with lower concentrations. 2. Relate active transport to human processes, such as glucose reabsorption in kidney tubules. 3. Highlight the role of active transport in maintaining concentration gradients in cells. Plenary (10 mins): Students create a flowchart showing the steps involved in ion uptake by root hair cells. |
| Resources | Diagram of root hair cells, examples of active transport in humans and plants, worksheets for creating flowcharts. |
| Time | 40 minutes |
| Homework | Research and write about one process in humans that relies on active transport. |
| Assessment | Students explain the importance of active transport and provide examples during class discussions and flowchart activities. |
| Past Paper Practice | IGCSE Biology 0610/31/O/N/20 Q2(b). |
Lesson 3: Protein Carriers in Active Transport
| Section | Details |
|---|---|
| Objective | – State that protein carriers move molecules or ions across a membrane during active transport. |
| Activities | Starter (5 mins): Ask students how particles might move through a cell membrane against a concentration gradient. Main (25 mins): 1. Explain the role of protein carriers in active transport: – Protein carriers bind specific molecules or ions. – They use energy from ATP to change shape and transport particles across the membrane. 2. Use diagrams or animations to show how protein carriers work. 3. Discuss examples like sodium-potassium pumps in nerve cells. Plenary (10 mins): Students label a diagram of a protein carrier during active transport. |
| Resources | Diagrams or animations of protein carriers, labeling worksheets. |
| Time | 40 minutes |
| Homework | Draw and label a diagram showing how a protein carrier facilitates active transport. |
| Assessment | Students correctly label diagrams and explain the role of protein carriers in active transport. |
| Past Paper Practice | IGCSE Biology 0610/41/M/J/18 Q2(c). |
Key Notes for Teachers:
- Highlight the differences between active transport, diffusion, and osmosis.
- Use relatable examples, such as root hair cells and glucose reabsorption, to illustrate the importance of active transport.
- Ensure students understand the role of energy (ATP) in active transport and how protein carriers facilitate the process.
Key Notes for Students:
- Active transport requires energy and moves particles against a concentration gradient.
- Protein carriers in the cell membrane are essential for active transport.
- Examples include ion uptake by root hair cells and glucose reabsorption in kidney tubules.
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