Sensors record the time between a tap on the tendon below a volunteer's knee and the lower leg starting to move.
The results are shown in the table.
| Test | Time / s |
|---|---|
| 1 | 0.048 |
| 2 | 0.057 |
| 3 | 0.060 |
In a report, a clinician gives 0.057 s as the mean response time and identifies the thigh muscle as the effector.
Which statement gives the correct assessment of the report?
The mean time is incorrect, but the effector is correct.
The mean time is correct, but the effector is incorrect.
The mean time and the effector are both correct.
The mean time and the effector are both incorrect.
111 exam-style questions on Edexcel GCSE Biology 2.3 The nervous system and brain, covering 2.3.1 Structures and functions of the brain, 2.3.2 Imaging brain function with scanning, 2.3.3 Limitations in treating nervous system damage, 2.3.4 Neurones and impulse transmission, and 2.3.5 Structure and function of a reflex arc. Each one has a worked solution and a mark scheme showing where the marks go.