本题目来源于试卷: SL/HL Topic C2.2 Neural signalling，类别为 IB生物学
[问答题]
8. Using a specific examu/ gk05if f gke7s;fl1ple, explain how synaptic tr xob dqxdi+liscwj/.fw1ya47z )1v 36ansmission can be affected by a chemical suzdfqc+aldo 3x1i7 ).ixv jwb 6 4ys1/wbstance from outside the body of the organism
参考答案: Exogenous chemical substances can stimulate/decrease/block synaptic transmission.
Exogenous substances can block receptor sites/prevent neurotransmitter release or reuptake.
(max 2 marks)
Example (1 mark for example, 1 mark for effect on the synapse).:
Cocaine blocks reuptake of transmitter substance.
Transmitter remains in the synaptic cleft causing continuous depolarisation of the post-synaptic membrane. (other relevant example)
本题详细解析:
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