Question

Not all words or phrases will be used. Each word or phrase should be used only once:

membrane potential, free diffusion, hydrophilic, transporter protein, facilitated diffusion, active transport, concentration, hydrophobic, noncovalent, amino acid, symport, amphipathic, ion channel, passive transport, passive, light driven.

For each of the following sentences, fill in the blanks with the best word or phrase selected from the list below. Not all words or phrases will be used; each word or phrase should be used only once. Transporter proteins and ion channels function in membrane transport by providing a pathway through the membrane for specific polar solutes or inorganic ions. A_ 2__ is highly selective in the solute it transports, binding the solute at a specific site and changing conformation so as to transport the solute across the membrane. For an uncharged molecule, the direction of passive transport across a membrane is determined solely by its_ gradient. On the other hand, for a charged molecule, the_ _4_ must also be considered. The Na+K+ pump is responsible for maintaining high extracellular sodium ion concentrations. This pump carries out a type of transport called

Answer 1

1.ion channel

2. Transporter proteins

3  concentration

4 membrane potential

5.active transport