| Date | November 2009 | Marks available | 2 | Reference code | 09N.3.SL.TZ0.15 |
| Level | Standard level | Paper | Paper 3 | Time zone | TZ0 |
| Command term | Explain | Question number | 15 | Adapted from | N/A |
Question
Explain the effect of tetrahydrocannabinol (THC) on brain function.
Markscheme
binds to cannaboid/pre-synaptic receptors;
inhibits neurotransmitter release;
therefore no excitation of post-synaptic membranes;
Examiners report
Many candidates explained the effect of THC correctly.
Syllabus sections
Option A: Neurobiology and behaviour » Option A: Neurobiology and behaviour (Additional higher level topics) » A.5 Neuropharmacology
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