Filtration: Cell membrane functions| Bio Scholar скачать в хорошем качестве

Filtration: Cell membrane functions| Bio Scholar

Filtration: Cell membrane functions| Bio Scholar 📌 What is Filtration? "Filtration is a type of passive transport that moves particles and fluids across a membrane due to pressure differences—not concentration gradients." "It does not require cellular energy or ATP—because the force comes from hydrostatic pressure, usually created by blood pressure or gravity." 🧪 Scientific Definition: "Filtration is the process by which water and small solutes pass through a selectively permeable membrane from an area of higher pressure to an area of lower pressure." 📌 Where Does Filtration Happen in the Body? ✅ 1. Filtration in the Kidneys (Nephrons) "The most well-known example of filtration happens in the glomerulus of the kidney." "Here, blood pressure forces water, salts, glucose, and small waste molecules out of the blood and into the nephron tubules—while larger molecules like proteins and blood cells stay behind." "This is the first and most crucial step in urine formation." ✅ 2. Capillary Filtration in Tissues "In body tissues, filtration also takes place at the level of capillaries." "As blood flows through tiny capillaries, pressure forces fluid and nutrients out of the blood into the surrounding tissues, providing nourishment to cells." 📌 Key Characteristics of Filtration: 🧪 Driven by Pressure – Not by concentration gradient. ⏱️ Fast and Efficient – Removes large volumes of fluid in short time. 🚫 Size Selectivity – Only small molecules and water pass; large ones are blocked. 💉 Common in Organs with High Blood Flow – Like kidneys and liver. ⚠️ Important Note: "Filtration is a non-selective process. It doesn’t ‘choose’ what to let through—anything small enough passes if the pressure is high enough." "That’s why selective reabsorption must follow, especially in organs like the kidneys." 🎯 Wrap-Up: So filtration is another passive but powerful transport process." "It plays a major role in fluid balance, waste removal, and nutrient exchange—all without the cell spending a single molecule of ATP." #filtration #cellmembrane #biology #bioscholar 📚 Follow Me for More Content: 📌SUBSCRIBE NOW:    / @bioscholar971   📌 Facebook: https://www.facebook.com/profile.php?... -------------------------------------============================--------------------------------------------- 📢 Disclaimer: This disclaimer emphasizes that the videos are not a replacement for medical textbooks, as textbooks are authored by experts, edited, and referenced. The creator of the videos does not claim expertise but draws from multiple sources for information and creates their own illustrations. They stress that any unintentional copyright infringement is accidental and express their sole intention of educating viewers. The videos are not intended for patient education or diagnosis; viewers are advised to consult licensed medical professionals for individual medical concerns. They are specifically aimed at assisting medicine and health sciences students in their studies and should be used solely for that purpose. Thanks.