Respiration
Energy for life
- Every living cell needs energy, all the time.
- Respiration is the release of energy from food.
- It is not the same as breathing.
Practice
Respiration is:
Respiration releases energy from food in every living cell — it is not the same as breathing.
Practice
Respiration and breathing are the same thing.
Breathing moves air in and out; respiration is the chemical release of energy inside cells.
What the energy is for
- muscle contraction (movement)
- protein synthesis (building proteins)
- cell division (making new cells)
- active transport
- growth, nerve impulses, and keeping a steady body temperature
Practice
The energy from respiration is used for which jobs? (Choose all that apply.)
Movement, active transport and protein synthesis all need energy from respiration.
You've got it
Key idea
- respiration = release of energy from food, in all living cells, all the time
- it is not breathing
- the energy powers movement, building molecules, active transport, growth and warmth