Cell Respiration Notes PDF
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These notes cover cellular respiration, a process where cells convert glucose into energy. The process, which occurs in the mitochondria, is broken down into stages including glycolysis, the Krebs cycle, and the electron transport chain. Different forms of respiration, aerobic and anaerobic, are also examined.
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## Cell Respiration Notes Once you get your food, it has to be converted into energy (true for plants AND animals). Cellular Respiration is the process by which cells convert **glucose** into **energy**. Cellular Respiration occurs in the **Mitochondria**. The general reaction for respiration occ...
## Cell Respiration Notes Once you get your food, it has to be converted into energy (true for plants AND animals). Cellular Respiration is the process by which cells convert **glucose** into **energy**. Cellular Respiration occurs in the **Mitochondria**. The general reaction for respiration occurs as follows: $C_6H_{12}O_6 + 6O_2 \implies 6CO_2 + 6H_2O + Energy$ The "energy" of which we speak occurs in the form of a molecule known as **ATP** (Adenosine Tri-Phosphate). This molecule is regarded as the currency unit for energy. The energy is actually stored in the **bonds** between the $PO_4$ . This type of respiration is considered **Aerobic** because it requires **Oxygen**. Another form of respiration called **Anaerobic** (without oxygen) respiration can occur in cells. In humans this occurs as **Lactic Acid** fermentation. This occurs during exercise when the cells cannot receive enough oxygen for aerobic respiration to occur. In this case, glucose is converted to **lactic Acid**. This causes the "puffy" or burning feeling in muscles after vigorous exercise. In yeasts and some microorganisms **Alcohol** fermentation occurs. Instead of lactic acid being produced, the glucose is converted to alcohol as a byproduct. Let's assume you eat a pop tart. get broken down into glucose. begin the process: 1. **Glycolysis** - Glucose is **cut** into two 3 - Carbon molecules of **pyruvate**. This happens in the cytoplasm of the cell. 2. Pyruvate then enters the **mitochondria** to begin the **Kreb's Cycle**. During the Kreb's Cycle, Carbon and Oxygen are released as $CO_2$ and the **hydrogens** are sent tot he Electron Transport Chain. 3. The Electron Transport Chain is the process by which **hydrogens** are pumped across the inner membrane of the mitochondria called the **cristae**. Through this process the majority of **ATP's** are created. (anywhere from 28 to 32 ATPs). The diagram shows the inner membrane of the mitochondria with the cristae and the matrix. Hydrogen ions are pumped across the inner membrane from the matrix to the outer membrane.
