To pass freely through a cell membrane, a molecule must be

Your sense of touch depends upon: a. direct contact b. heat chemical c. reactions d. pain

What might explain the real-world results, show in the graph to the right, for one class of twenty students? check all that apply.

I've created a synthetic cellular membrane that is made up of phospholipids, but contains no proteins. which of the types of movements across a membrane would not function with my synthetic membrane?