1 A2/A-level Biology resources Search within results Go How ratings and recommendations work Apply Filter resourcesClear all filtersLevelClear filter A2/A-level SubjectClear filter Biology Exam board WJEC TopicClear filter Human, animal and plant behaviour Human, animal and plant physiology Nerve Impulse Synaptic Transmission The Nervous System Resources Revision Notes The Synaptic Transmission A2/A-level, Biology Revision notes Search again