Key Takeaways Glucose & Daily Need Blood Sugar Your body needs some glucose in the blood every day because several tissues still depend on it. Red blood cells are the clearest example because they lack mitochondria, so they must make energy through glycolysis. Some parts of the kidney, eye and nervous system also keep using … Read more
Key Takeaways The 10 Year Claim The Short Answer Your body does not become fully brand new every ten years. Many cells are replaced all the time, but different tissues renew at very different speeds. Some cells live only a few days. Some last for decades. Some parts can stay with you for most of … Read more
Key Takeaways Methylation Basics Cell Switches Methylation is one of the ways your body controls cell work. It adds a small carbon group to certain molecules, including DNA, proteins and hormones. This can help turn genes up or down without changing the gene code itself. DNA methylation helps normal cells stay stable, repair damage and … Read more
Key Takeaways Bioelectric Basics Charge Across Membranes Cells separate charged minerals between the inside and outside of the membrane. This separation creates a voltage, often called the resting membrane potential, and it exists in almost every living cell. Voltage in biology describes a difference in electrical charge, not a store of usable power like a … Read more