2 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 AQA TopicClear filter stimuli and response Resources Revision Cards Communication between the heart and brain A2/A-level, Biology 1 revision cards Control of heart beat A2/A-level, Biology 1 revision cards Search again