Doctors compare three children of the same age and sex, with similar body masses.
The table shows each child's basal metabolic rate and increase in height over one year.
| Child | Basal metabolic rate in kJ per day | Increase in height in cm |
|---|---|---|
| J | 4100 | 2.4 |
| K | 5400 | 5.5 |
| L | 5500 | 5.8 |
Explain which child is most likely to have the lowest concentration of thyroxine in the blood.
85 exam-style questions on AQA GCSE Biology 5.3 Hormonal coordination in humans, covering 5.3.1 Human endocrine system, 5.3.2 Control of blood glucose concentration, 5.3.3 Maintaining water and nitrogen balance in the body, 5.3.4 Hormones in human reproduction, 5.3.5 Contraception, 5.3.6 The use of hormones to treat infertility (HT only), and 5.3.7 Negative feedback (HT only). Each one has a worked solution and a mark scheme showing where the marks go.