This key facts covers Uses of Energy from Respiration within Respiration for GCSE Biology. Topic 2: Respiration It is section 9 of 17 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
📋 Uses of Energy from Respiration
The energy released by respiration is essential for every living process:
- Muscle contraction — movement and locomotion
- Maintaining body temperature — mammals and birds are endothermic
- Active transport — moving substances against concentration gradients (e.g., mineral ions in root hair cells)
- Building larger molecules — synthesising proteins from amino acids, starch from glucose, lipids from fatty acids and glycerol
- Cell division — growth and repair require energy for DNA replication and organelle production
- Nerve impulse transmission — maintaining electrical signals in neurones
All living organisms respire continuously — plants, animals, fungi, and bacteria. Plants need energy from respiration just as much as animals do, even though they also photosynthesise.
Practice questions for Respiration
Where in the cell does aerobic respiration take place?
Give three uses of energy released from respiration.
Quick recall flashcards
Word equation for aerobic respiration?
glucose + oxygen → carbon dioxide + water
(+ energy released)
Is respiration endothermic or exothermic?
Exothermic — it releases energy from glucose.
This energy is used for movement, growth, and keeping warm.