Explain explain that during exercise the body reacts to increased demand for energy in the context of Respiration.

energy demand is the starting point for this answer. During exercise the body reacts to increased demand for energy. A clear answer should keep that idea linked to Response to exercise in Respiration. You can support the point by showing that in Response to exercise, energy demand refers to the increased requirement for energy by the body during physical activity. This matters in Respiration because it supports the learning objective to explain that during exercise the body reacts to increased demand for energy. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions. Do not students often think that the body only requires energy during exercise and not at rest; instead emphasize that the body continuously requires energy for basic functions, and during exercise, the demand increases significantly.

This question expects a structured explanation, not a single isolated fact. Credit comes from naming the correct idea, using precise biological vocabulary, and keeping the answer anchored to Response to exercise. Use review how the body responds to increased energy demands during exercise, focusing on heart rate, breathing rate, and energy transfer. Link your answer to Response to exercise in Respiration, and keep the biology specific to exercise.