into the city. The problem? Glucose didn't have any ATP coins left, and the city was already full of sugar. Instead of paying directly, Glucose waited by the gate for a Sodium ion that was trying to sneak back in (since ATP-A had just pumped so many outside). As the Sodium ion rushed down its "pressure gradient" to get back home, Glucose grabbed onto its coat. The pump opened to let Sodium in, and Glucose (Use this format for Instagram captions or Twitter
Let’s break them down.
Cells need to move things from Low concentration → High concentration. This is like rolling a boulder uphill; it requires energy! Glucose didn't have any ATP coins left, and