cell activities

• 60% of energy is lost as heat
• • 40% is used for
  • muscle contraction
  • active transport across cell membranes
  • synthesis of large molecules needed for growth and repair
  • transmission of nerve impulses
  • cell division and growth
  • maintain body temperature
  • cellular activities such as the movement of substances in the cell
  • movement of the cell
• energy must be continually consumed in the form of food to replace the loss in heat and used for other purposes
• reactions of cellular respiration are catabolic (they release energy as larger molecules are broken down into smaller ones)
• ATP is able to transfer energy from cellular respiration to other chemical reactions