During exercise the human body responds to the increased demand for energy.
Give two changes that take place in the body during exercise.
Name the substance that builds up in the muscles during long periods of vigorous exercise.
Give the name used for the condition in which muscles stop contracting efficiently after long periods of vigorous exercise.
51 exam-style questions on AQA GCSE Biology 4.2 Respiration, covering 4.2.1 Aerobic and anaerobic respiration, 4.2.2 Response to exercise, and 4.2.3 Metabolism. Each one has a worked solution and a mark scheme showing where the marks go.