: Form water-filled pores that allow specific molecules or ions (like sodium or potassium) to flow through quickly.
Does not use ATP directly. Instead, it couples the uphill movement of one solute to the downhill movement of another (usually Na⁺ or H⁺) that was previously established by primary active transport. transport function of protein
: Complex proteins that carry lipids (fats) and cholesterol through the water-based environment of the blood. Why This Function Matters : Form water-filled pores that allow specific molecules