Response to exercise (4.4.2.2) | AQA GCSE Combined Science: Trilogy (8464) — Biology — Foundation | KnowledgeSet

Response to exercise

Biology (Combined Science) · GCSE · AQA · AQA GCSE Combined Science: Trilogy (8464) — Biology — Foundation · Specification point · 4.4.2.2 · Bioenergetics · Respiration

Anaerobic respiration

Cardiorespiratory responses to exercise

Oxygen debt

Muscle fatigue

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4.4.2.2 Response to exercise

Content	Key opportunities for skills development
$During exercise the human body reacts to the increased demand for energy. The heart rate, breathing rate and breath volume increase during exercise to supply the muscles with more oxygenated blood. If insufficient oxygen is supplied anaerobic respiration takes place in muscles. The incomplete oxidation of glucose causes a build up of lactic acid and creates an oxygen debt. During long periods of vigorous activity muscles become fatigued and stop contracting efficiently.$	$AT 1, 3, 4 Investigations into the effect of exercise on the body.$

Content

Key opportunities for skills development

During exercise the human body reacts to the increased demand for energy. The heart rate, breathing rate and breath volume increase during exercise to supply the muscles with more oxygenated blood. If insufficient oxygen is supplied anaerobic respiration takes place in muscles. The incomplete oxidation of glucose causes a build up of lactic acid and creates an oxygen debt. During long periods of vigorous activity muscles become fatigued and stop contracting efficiently.

AT 1, 3, 4 Investigations into the effect of exercise on the body.