A healthy technician carries out a six-hour procedure in a warm clean room. The technician sweats while wearing protective clothing and does not eat or drink during the procedure.
The table shows measurements taken during the procedure.
| time | blood glucose concentration / mmol dm⁻³ | rate of urine production / cm³ h⁻¹ |
|---|---|---|
| 09:00 | 5.2 | 72 |
| 15:00 | 3.8 | 26 |
Use the data to explain how glucagon helps to control the technician's blood glucose concentration during the procedure.
Use the data to explain the change in the rate of urine production during the procedure.
Predict how the concentration of the urine produced at 15:00 would compare with the concentration of the urine produced at 09:00.
94 exam-style questions on Edexcel GCSE Biology 7.4 Blood glucose and the urinary system, covering 7.4.1 Insulin and blood glucose control, 7.4.2 Glucagon and blood glucose regulation, 7.4.3 Type 1 and type 2 diabetes, 7.4.4 Structure of the urinary system, 7.4.5 Structure and function of the nephron, 7.4.6 ADH and water regulation, 7.4.7 Treatments for kidney failure, and 7.4.8 Production of urea in the liver. Each one has a worked solution and a mark scheme showing where the marks go.