B4- Respiration and Metabolism

• What is the primary source of energy for the body?

  Food
• How is energy transferred in the body?

  Through respiration
• What is respiration NOT defined as?

  Breathing in and out
• What is the process of respiration primarily responsible for?

  Transferring energy from the breakdown of glucose
• Where does respiration occur?

  In every living cell
• Do plants undergo respiration?

  Yes, plants also undergo respiration
• What type of reaction is respiration?

  Exothermic
• What is one use of energy transferred by respiration in organisms?

  To build larger molecules from smaller ones
• How do animals use energy from respiration?

  To allow muscles to contract
• How do mammals and birds utilize energy from respiration?

  To maintain a steady body temperature
• What does metabolism encompass?

  All the chemical reactions in an organism
• What role do enzymes play in cellular reactions?

  They control the chemical reactions
• What are the two types of reactions in metabolism?

  • Building larger molecules from smaller ones
  • Breaking down larger molecules into smaller ones
• What is formed when small glucose molecules are joined together?

  Starch, glycogen, and cellulose
• What is the composition of lipid molecules?

  One molecule of glycerol and three fatty acids
• What happens to glucose in respiration?

  It is broken down to transfer energy
• What is produced when excess protein is broken down?

  Urea
• What is the total of all reactions in a cell called?

  Metabolism
• What are the key components of respiration and metabolism?

  • Respiration transfers energy from glucose
  • Occurs in every living cell
  • Exothermic process
  • Metabolism includes all chemical reactions
  • Enzymes control reactions