Work through the list without notes. If you cannot do a statement, follow its link, then come back. Guide = study guide; Practice = practice questions.
Understanding
- I can name the parts of a feedback loop and explain what a set point is. (Guide: “Parts of a feedback loop”)
- I can explain the difference between negative and positive feedback in terms of what the response does to the stimulus. (Guide: comparison table; Practice Q1)
- I can describe how insulin and glucagon keep blood glucose near its set point. (Guide: Figure 1; Practice Q4)
- I can explain end-product inhibition as negative feedback at the molecular level. (Guide: “Negative feedback inside cells”; Practice Q2)
- I can describe childbirth, lactation and fruit ripening as positive feedback, and say what ends each loop. (Guide: “Positive feedback”; Practice Q5, Q6)
Calculation and skills
- I can describe glucose or hormone data with peaks, timings and percentage changes. (Guide: Worked example 1; Practice Q4)
- I can use a simple model to show how a negative feedback correction shrinks and a positive feedback change grows. (Guide: Worked example 2; Practice Q7)
- I can describe a slow-start, steep-rise, levelling-off pattern using numbers from a table. (Practice Q6)
Reasoning
- I can find the broken link in a loop and predict what the variable and the signal will do. (Guide: “When feedback fails”; Practice Q3, Q4)
- I can explain the difference between type 1 and type 2 diabetes as two different broken links in the same loop. (Guide: “When feedback fails”; Worked example 1)
- I can use evidence from several treatment groups to justify a claim that a process involves positive feedback. (Practice Q6)
All ticked? Move on to Topic 4.5, Cell Cycle, or return to the course roadmap.