A participant spends seven days in a room kept dark throughout. Researchers record when the participant first falls asleep.
| Day | Time sleep begins |
|---|---|
| 1 | 23:00 |
| 4 | 00:00 |
| 7 | 01:00 |
Describe how the suprachiasmatic nucleus, the pineal gland and melatonin can explain the change in sleep onset shown in the table.
53 exam-style questions on OCR GCSE Psychology 6.1 Key Concepts, covering 6.1.1 Functions, features and benefits of sleep, 6.1.2 Causes of sleep disorders, and 6.1.3 Endogenous pacemakers and exogenous zeitgebers. Each one has a worked solution and a mark scheme showing where the marks go.