A patient is recovering after a medical procedure. Receptors detect that two internal conditions are away from their optimum values. Each receptor continues to send information while the condition it detects is away from its optimum.
| Internal condition | Current value | Optimum value |
|---|---|---|
| Body temperature in °C | 35.8 | 37.0 |
| Blood glucose concentration in mmol dm⁻³ | 6.8 | 5.0 |
The table shows the effects of two effectors.
| Effector | Effect on body temperature | Effect on blood glucose concentration |
|---|---|---|
| Muscle M contracts | Increases | No effect |
| Gland G releases a hormone | No effect | Decreases |
Explain which effector the coordination centres should activate for each internal condition.
A fault prevents Muscle M from being activated. The fault causes only Gland G to be activated whenever either receptor sends information.
Predict what will happen to both internal conditions after the blood glucose concentration first reaches 5.0 mmol dm⁻³ if the fault continues.
76 exam-style questions on AQA GCSE Biology 5.1 Homeostasis, covering 5.1 Homeostasis. Each one has a worked solution and a mark scheme showing where the marks go.