Margo

A simple guide to the Krebs Cycle The Krebs cycle (also called the citric acid cycle) is the engine room of your cells. It takes the food you eat and turns it into the energy currency your body runs on: ATP. Here’s how it works, step by step: 1️⃣ Fuel Enters as Acetyl-CoA Carbs, fats, and proteins all break down into acetyl-CoA, the entry ticket into the cycle. 🟢 Example: A slice of bread, a piece of meat, or olive oil will all eventually feed into this same pathway. 2️⃣ Citrate is Made Acetyl-CoA joins oxaloacetate to form citrate. this starts the cycle rolling. 🟢 Example: This is why it’s called the “citric acid cycle.” 3️⃣ Stepwise Transformations Citrate is shuffled through a series of chemical changes (isocitrate → α-ketoglutarate → succinyl-CoA → succinate → fumarate → malate → oxaloacetate). 🟢 Example: Each step extracts energy in small packets. 4️⃣ High-Energy Carriers Are Made At multiple steps, electrons are pulled out and stored in NADH and FADH₂. 🟢 Example: Think of NADH and FADH₂ as charged batteries carrying energy to the next stage. 5️⃣ ATP is Generated One molecule of ATP (or its cousin GTP) is made directly in the cycle. 🟢 Example: This is like pocket change compared to the big payoff later. 6️⃣ CO₂ is Released As carbons are stripped from the molecules, carbon dioxide (CO₂) is released as waste. 🟢 Example: The CO₂ you breathe out is literally waste gas from your Krebs cycle. 7️⃣ Oxaloacetate is Recycled The cycle regenerates oxaloacetate so it can combine with a new acetyl-CoA. the cycle spins again. 🟢 Example: It’s like a wheel that keeps turning as long as fuel is supplied. The Krebs cycle is the hub of metabolism. It takes food (via acetyl-CoA), spins it through a cycle, strips out electrons, and sends them to the electron transport chain where the real energy payoff (lots of ATP) is made. Every breath you take and every calorie you eat feeds into this cycle.

Hasta en esto, el tamaño importa.

🌄 Abre o día en pleno verán, o luscofusco da paso ao nacer do sol. As nubes altas (chamadas cirrus, no exemplo do video), adornan o ceo, mentras que, por outro lado, o vento do norte, acumula nubes baixas (chamadas estratos) a carón das serras máis altas de Campo Lameiro Segue