Primary Active Transport Secondary Active Transport Today

When primary transport creates a high concentration of an ion (usually Sodium) on one side of the membrane, that ion "wants" to diffuse back in. The cell uses a co-transporter protein to let the ion flow back down its gradient, but only if it brings another molecule (like glucose) along for the ride. Two Types of Secondary Transport

Ever wonder how a cell moves substances against their natural flow—like stuffing a room fuller when it’s already packed? That’s the magic of . primary active transport secondary active transport