Photosynthesis and Cellular Respiration

Photosynthesis  The process in which organisms use water along with sunlight and carbon dioxide to make food

What performs photosynthesis?  Autotrophs -an organism that can “make” its own food  Examples of Autotrophs include: Algae -a simple nonflowering plant that is often unicellular Phytoplankton -microscopic plants that drift or float in the sea or in fresh water And of course…. PLANTS !

How does photosynthesis work? INPUTS  Sunlight- absorbed by chlorophyll  6 Water Molecules  6 Carbon Dioxide Molecules

How does photosynthesis work? OUTPUTS  1 molecule of Glucose  6 molecules of O 2

All together: Are both sides even for each element? + + =

Written and Chemical Formula for Photosynthesis  Carbon dioxide + water+ sunlight  glucose +oxygen  6CO 2 + 6H sunlight  C 6 H 12 O 6 + 6O 2

Cellular Respiration  How glucose (a simple sugar) is broken down in the mitochondria for energy  Cellular Respiration occurs after photosynthesis  Powerhouse-Mitochondria break things down, like our digestive system

If we already have glucose, why do we need cellular respiration?  Glucose has to be broken down into ATP: an energy source that plants and humans can use  Glucose is stored until it’s needed!

Written and Chemical Formula for Cellular Respiration  Glucose + Oxygen  Carbon Dioxide + Water + Energy (ATP)  C 6 H 12 O 6 + 6O 2  6CO 2 + 6H 2 O + ENERGY (ATP)

Cellular Respiration: in plants and animals

Photosynthesis and Cellular Respiration  Photosynthesis releases oxygen into the air so we all can survive  Photosynthesis also gives us glucose when we eat a plant  This energy is then turned into a usable form through cellular respiration

Photosynthesis and Cellular Respiration  ww.yout ube.com /watch? v=JUmT2 4R8CyA ww.yout ube.com /watch? v=JUmT2 4R8CyA