Cellular Interactions with the Environment
Assignment Active
Analyzing Movement across a Selectively Permeable Membrane
The diagram shows molecules moving across a
selectively permeable membrane. The smaller circles
represent salt molecules, and the dashed line
represents the membrane. Which statement best
describes the movement of the salt molecules?
OO
O Their movement requires energy
Their movement represents active transport.
O They move from high concentration to low
concentration
They become unevenly distributed.