CAIE A Level Biology 9700 · Control and coordination
Calcium ions play a crucial role in both synaptic transmission and muscle contraction. Compare the role of calcium ions in the transmission of an impulse across a cholinergic synapse with the role of calcium ions in the contraction of striated muscle.
7 marks, so the mark scheme is looking for about 7 separate creditworthy points. Making the same point twice in different words earns it once.
Compare means: Give similarities or differences between two things, and say which side each point belongs to. Write each point as a pair, for example: A is X, whereas B is Y. Two separate descriptions rarely earn the marks.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.