| Date | November 2015 | Marks available | 1 | Reference code | 15N.3.HL.TZ0.5 |
| Level | Higher level | Paper | Paper 3 | Time zone | TZ0 |
| Command term | State | Question number | 5 | Adapted from | N/A |
Question
The diagram shows the procedure used by Pavlov during his experiment on dogs.
State the type of stimulus provided by the sight and smell of the food.
[1]
a(i).
State the function of the tube.
[1]
a(ii).
State two effects presynaptic neurons could have on postsynaptic transmission.
[1]
b.
Markscheme
unconditioned (stimulus)
a(i).
to collect the saliva (for measurement of volume)
a(ii).
excitation and inhibition
b.
Examiners report
The majority of candidates did well in the first part of this question.
a(i).
The majority of candidates did well in the first part of this question.
a(ii).
[N/A]
b.
Syllabus sections
Option A: Neurobiology and behaviour » Option A: Neurobiology and behaviour (Additional higher level topics) » A.4 Innate and learned behaviour
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