Cellular respiration

1. Cellular respiration

2. Cellular respiration is when cells break down glucose (sugar) molecules and make other, energy-carrying molecules • Respiration happens in the mitochondria. This is why it is called the powerhouse of the cell. • Don’t forget, the glucose is made during photosynthesis • It can then be used by the plants or the plants are eaten by another organism that uses the sugar

3. There are two types of cellular respiration • Aerobic and anaerobic • Aerobic respiration requires oxygen. This is the type of respiration that animals and plants do. • Anaerobic respiration can be done without oxygen. This process is also known as fermentation. • This type of respiration is done by fungi and some bacteria

4. This is aerobic respiration • C6h12o6 + 6 02 6 co2 + 6 h20 + energy This is the chemical reaction for respiration • 6 co2 + 6 h20 + energy  c6h12o6 + 6 o2 this is the chemical reaction for photosynthesis • What relationship do you notice?

5. Aerobic respiration produces carbon dioxide (co2) as a by product. It also produces many helper molecules and lots atp (adenosine triphosphate)molecules. • Atp is the molecule that carries energy around and readily gives it up so it can be used for all the processes in the body • By breaking down 1 glucose the body can produce 38 atp molecules. think about how many billions of glucose molecules you might eat on a typical day, then multiply it by 38. That makes a lot of atp.

7. Anaerobic respiration • In this process, glucose is broken down without the use of oxygen • There are two types of anaerobic respiration: alcohol fermentation and lactic acid fermentation • These process do not make as much atp as aerobic respiration does. They do, however, make other useful molecules. • Specifically, ethanol. This is the alcohol that humans sometimes consume. And lactic acid. This is found in yogurt, kimchi, sauerkraut and other fermented foods.

8. Fun facts • Real sauerkraut and pickles and corned beef are all fermented. Not, pickled in vinegar. The sour taste comes from the lactic acid. Fermented foods are very good for your digestive tract and overall health. • Humans have been fermenting foods, as a way to preserve them, for thousands of years. • When you exercise too heavily and start to get out of breath, your body will switch from aerobic respiration to lactic acid fermentation. This is because your body isn’t getting enough oxygen. The lactic acid is what causes some of the muscle soreness you might experience. • The early colonists used to drink hard (alcoholic) apple cider frequently because it was safer than drinking dirty water.