A swelling reduces the activity of an endocrine gland at the base of a person's brain.
The concentrations of two hormones in the person's blood were measured.
| Time after the activity of the gland was reduced in days | TSH concentration in mIU/L | Thyroxine concentration in nmol/L |
|---|---|---|
| 0 | 2.8 | 110 |
| 3 | 1.4 | 89 |
| 6 | 0.3 | 62 |
Name the endocrine gland affected by the swelling.
Explain how the reduced activity of this gland accounts for the changes in the table and predict how the person's metabolic rate on day 6 compares with day 0.
89 exam-style questions on Edexcel GCSE Biology 7.1 Hormones and coordination, covering 7.1.1 Endocrine glands and hormone transport, 7.1.2 Adrenalin and fight or flight, and 7.1.3 Thyroxine and negative feedback. Each one has a worked solution and a mark scheme showing where the marks go.