plant processes respiration
DESCRIPTION
TRANSCRIPT
Plant Processes: Respiration
8SCIENCE: Tues. Feb. 15
Review: Why is photosynthesis an important plant process?
• Photosynthesis = process of making food • Organisms like plants provide food for almost all other
living things on Earth• Plants release oxygen into atmosphere – almost 90% of
oxygen is from photosynthesis
Respiration
• Related to photosynthesis• Respiration is a series of chemical reactions
that all organisms use to break down food to release energy
• Respiration in most organisms requires oxygen – This is called aerobic respiration– Aerobic means using oxygen
Respiration
Chemical reaction for respiration:C₆H₁₂O₆ + 6O₂ 6CO₂ + 6H₂O + energy Glucose and oxygen produce carbon dioxide and water and energy
• Is this equation familiar? How does it relate to the equation for photosynthesis?
*Remember: During photosynthesis CO₂ and H₂O are combined with light energy to create glucose and O₂. *In respiration oxygen and glucose are combined to release the energy found in the bonds of the food (glucose) and this creates CO₂ and H₂O
Why is respiration important?
• Provides energy needed by the cell and gives energy to the whole organism
• During respiration, food energy is changed into a form that plant cells (and your cells!) can use
• Aerobic respiration returns CO₂ to the atmosphere to be used again in photosynthesis