B6.10.3 - Co-Transporters

Which monomers are absorbed in epithelial cells?

amino acids and monosaccharides

What proteins does the absorption of amino acids and monosaccharides in epithelial cells involve?

co-tranposrters

What type of co-transporters are in epithelial cell membranes?

sodium-dependent

What is the first step in co-transport of amino acids/monosaccharides?

co-transporters actively transport Na⁺ ions into the blood from the cells

What ions are involved in the co-transport of amino acids/monosaccharides?

Na⁺

What is the next step in co-transport of amino acids/monosaccharides after Na⁺ ions are actively transported into the blood?

Na⁺ ion concentration in epithelial cells decreases

By what process are Na⁺ ions transported into the blood during co-transport of amino acids/monosaccharides?

active transport

What is the next step in co-transport of amino acids/monosaccharides after the Na⁺ concentration in epithelial cells decreases?

Na⁺ ions bind to a co-transporter protein in the membrane

What do Na⁺ ions bind to to enter epithelial cells?

co-transporters

What is the next step in co-transport of amino acids/monosaccharides after Na⁺ ions bind to a co-transporter protein in the membrane?

amino acids/monosaccharides bind to the co-transporter protein

What is the next step in co-transport of amino acids/monosaccharides after amino acids/monosaccharides bind to the co-transporter?

co-transporter protein undergoes a conformational change

What is it called when a co-transporter protein changes shape?

conformational change

What is the next step in co-transport of amino acids/monosaccharides after the co-transporter protein undergoes a conformational change?

Na⁺ ions and amino acids/monosaccharides are transported into the epithelial cytoplasm