CELL PROCESSES

1
CELL PROCESSES ENERGY

• Photosynthesis
• Respiration
• Cell Division
• Cancer

2
Photosynthesis

• Objectives
• Describe the process of photosynthesis
• Explain how the sun supplies all living things
  with the energy they need
• Key Terms
• Photosynthesis, pigment, chlorophyll, stomata,
  autotroph, heterotroph

3
PhotosynthesisA Two-Stage Process

• Photosynthesis process by which a cell captures
  the energy in sunlight uses it to make food
• Solar energy is used to convert CO2 and H2O into
  O2 sugars (glucose)
• 1st Step - Capture suns energy
• Chloroplasts in green plant parts
• Chloroplasts contain the pigment chlorophyll
• Pigments colored chemical compounds that absorb
  light

4
2nd Step

• Use energy to make food
• Sugars
• Glucose (C6H12O6)
• Stomata small openings on underside of leaves

5
Equation dissection

• 6CO2 6H20 ? C6H12O6 6O2
• Raw materialsYieldsProducts
• How many molecules of each?
• Products are used, converted, or stored
• Sugar ? cell energy, cellulose, consumption
• All photosynthetic organisms release oxygen

6
Photosynthesis Diagram

7
Photosynthesis Life

• Autotroph organism that makes its own food
• Heterotroph organism that cannot make its own
  food
• Nearly all living organisms obtain energy
  directly or indirectly from the energy of
  sunlight captured during photosynthesis!!!

8
Concept Check

• How many stages are in photosynthesis
• What are the raw materials and products of
  photosynthesis
• Why is photosynthesis important to life