What is the difference between a chemical gradient and an electrical gradient, and how do they interact in biological systems?

A chemical gradient is a difference in concentration of molecules across a space, while an electrical gradient is a difference in charge across a space. In biological systems, these gradients work together to drive the movement of ions and molecules across cell membranes. The interaction between chemical and electrical gradients helps regulate processes like nerve signaling, muscle contraction, and nutrient uptake in cells.