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Any three of the following, in the correct order.
Action potential arrives at the pre-synaptic membrane Causes the voltage gated Ca2+ channels in the pre synaptic terminal to openCa2+ enters the pre ...

This is a typical example of a 3 mark question on a GCSE higher paper. The first mark would be awarded for multiplying both sides of the equation by 2, and then expanding the brackets:10 - x =2(2x-6)10 - ...

In Chinua Achebe’s Things Fall Apart, Seamus Heaney’s North, and Muriel Spark’s The Ballad of Peckham Rye, identity is presented as a site of brutal conflict and violence, sundering the tense surface of t...