- cellular respiration = aerobic process (requires oxygen)
- cell exchanges two gases with it's environment - respiration
- cell takes in oxygen, gives out CO2
- glucose = fuel for cellular respiration
- glucose + 6oxygen = 6CO2 + 6H2O + around 38 ATP
- generate ATP for cellular work
- when electron "falls" towards nucleus, potential energy released
- oxygen attracts electrons
- carbon + hydrogen do not have as strong a pull
- sugar = carbon-hydrogen bonds, bonds exchanged with hydrogen-oxygen, carbon-oxygen bonds
- electrons fall in direction of oxygen = energy released
- glucose breaks down in small steps
- oxygen only enters as electron acceptor
- electron carriers recieve high-energy electrons from glucose
- electrons undergo transfer, give off energy
Concept Check
1. Breathing and cellular respiration both involve oxygen and carbon-dioxide. The oxygen is taken in, while the carbon-dioxide is released out. Breathing helps to get the oxygen that is required for cellular respiration. The carbon dioxide that is made from cellular respiration, is released out through exhaling.
2. The reactants of cellular respiration are 1 glucose molecule, and 6 oxygen molecules. The products are 6 carbon-dioxide molecules, 6 water molecules, and around 38 ATP.
3. Oxygens attract electrons just like gravity. As the electrons slowly "fall" step by step, they give off energy. Everytime they go down one "step", potential energy is released.
4. As the electrons gradually fall, they give off a little bit of potential energy, everytime they fall. The energy builds up and produces ATP.
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