Use cash management accounts to manage, move, and use your money easilyâand without any extra fees. Flexible cash management provides you the freedom to access, spend, and manage your money the way you want-with a debit card and free ATM withdrawals, free check writing, and free online bill pay**.
Facilitated diffusion requires. enzymes. carrier proteins. lipid carriers. carbohydrate carriers. lipid or carbohydrate carriers. 2. Facilitated diffusion occurs. into the cell only. out of the cell only.
Each carrier protein is designed to recognize only one substance or one group of very similar substances. The molecule or ion to be transported (the substrate) must first bind at a binding site at the carrier molecule, with a certain binding affinity.