AIM: How do mitochondria make ATP energy for cells? DO NOW: Where would we find more mitochondria: muscle cells or skin cells? Why? Where can we find mitochondria?

Cellular Respiration Process that takes energy from sugar molecules (organic molecules) & places it into molecules of ATP Glucose (sugar) energy is converted into ATP energy ATP is the usable form of energy for all living things Requires oxygen aerobic respiration Takes place in mitochondria of both animal & plant cells

Mitochondrion

Let’s Look at the Reaction! Glucose & Oxygen Carbon Dioxide & Water & ATP WORD EQUATION C6H 12O6 & O2  CO2 & H2O & ATP CHEMICAL EQUATION Question: What are the reactants / substrates in the reaction? Question: What are the products of the reaction?

Question What kind of organic catalysts are involved in cellular respiration? Hint: They speed up the rate of this reaction, making it more efficient! Answer:___________________

ATP Breakdown ATP energy, which has 3 phosphate groups, is released, when it is broken down into a molecule called ADP, which has 2 phosphate groups

Common Misconceptions Cellular respiration is breathing it’s not! It is a chemical form of respiration Typical respiration is a physical process & involves the exchange of gases which are needed for cellular respiration Inhaling & exhaling does not give you ATP energy

Humans & Anaerobic Respiration At times, humans may be forced to get energy by way of Anaerobic Respiration (without using oxygen) we produce LACTIC ACID, during these times, which accumulates in our muscles, & causes the “burn” & pain that you feel Ex. strenous exercise Less efficient or less ATP made

Q: What will build up in this girl’s muscles?

Brain-Pop Video https://www.brainpop.com/science/cellularlifeandgenetics/cellularrespiration/

Homework Read textbook pages 220-221 & on page 221, answer questions 1, 3, and 4 Write out questions & answers