K+ looked at the tiny, beautiful imbalance he was part of. He wasn’t trapped anymore. He was charged —literally holding potential energy in his position, ready to flow back when the cell called for a signal, a thought, a heartbeat.
Without the gatekeeper, the inside and outside would become equal. The cell’s voltage would flatline. Nerve signals would stop. Muscles would freeze. The heart would forget its rhythm. role of active transport
K+ looked back one last time. “No,” he said. “It’s the only way to make a real difference.” K+ looked at the tiny, beautiful imbalance he was part of