Photosynthesis and Respiration

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Photosynthesis and Respiration

• Opposite Processes

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Taking in Raw Materials

• Most water enters through the roots and then
  moves up through the plant
• Water vapor exits through the stomata on the
  leaves
• Carbon dioxide and oxygen enter and exit through
  the stomata on the surface of the leaves

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Leaf Structure and Function

• Epidermis outer layer containing many stomata
  to control water loss
• Palisade food is produced here
• Pigment helps plants absorb sunlight to make
  food

• Spongy layer contains carbon dioxide and water
  needed for food production
• Chloroplasts cell structures in which
  photosynthesis occurs

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Photosynthesis

• Plants use carbon dioxide, water, and sunlight in
  the presence of chlorophyll to make glucose and
  oxygen

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CO2 water sunlight chlorophyll gt
glucose oxygen

• Chemical equation for photosynthesis

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Photosynthesis

• Photo-light
• Synthesis.combining parts to make a whole
• Photosynthesis the process that uses light to
  combine carbon dioxide and water into a larger
  sugar molecule (Glucose)

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Light-dependent reactions

• Sunlight splits water into oxygen and hydrogen
• The oxygen is released as a waste product

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Light-independent reactions

• Carbon dioxide and hydrogen (from the
  light-dependent reactions) combine to make
  glucose.
• Carbon dioxide Hydrogen gt Glucose
• (C6H12O6)
• Extra glucose is stored as other sugars an d
  starches.

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Importance of Photosynthesis

• Directly or indirectly produces food for almost
  all organisms
• Removes carbon dioxide from and adds oxygen to
  the atmosphere

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Respiration

• The Breakdown of Food

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Respiration chemical reactions that break down
food molecules and release energy

• Glucose Oxygen gt Carbon dioxide Water
  Energy

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Importance of Respiration

• Energy helps plants transport and produce
  materials and keeps you alive
• Waste product is carbon dioxide which is returned
  to the atmosphere

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Opposite Processes

• Photosynthesis, occurring only in cells with
  chlorophyll, combines carbon dioxide and water
  using sunlight and releases glucose and oxygen.

• Aerobic respiration occurs in the mitochondria of
  all cells and combines oxygen and food and
  releases energy, carbon dioxide, and water.

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