* Cellular Respiration: This is the process by which cells break down carbohydrates (specifically glucose) in the presence of oxygen to release energy in the form of ATP (adenosine triphosphate).
* ATP: ATP is the main energy currency of cells. It's used to power various cellular activities like muscle contraction, nerve impulses, and protein synthesis.
The Process:
1. Glycolysis: Glucose is broken down into pyruvate, producing a small amount of ATP.
2. Krebs Cycle (Citric Acid Cycle): Pyruvate enters the mitochondria and goes through a series of reactions, generating more ATP and electron carriers (NADH and FADH2).
3. Electron Transport Chain: Electrons from NADH and FADH2 move through a chain of proteins, releasing energy that's used to pump protons across the mitochondrial membrane. This creates a proton gradient that drives the production of large amounts of ATP.
Other Energy Sources:
While carbohydrates are a primary source, cells can also use fats and proteins for energy, although they are metabolized differently.
Let me know if you'd like to explore any of these processes in more detail!
