The diagram illustrates part of the cell surface membrane of an active animal cell. Region X has a more negative water potential, while region Y has a less negative water potential. Which statements below correctly describe the net movement of molecules across this membrane? 1. Oxygen diffuses from X to Y through molecules M. 2. Carbon dioxide diffuses from X to Y through molecules M. 3. Water travels from Y to X through molecule L.
- A1, 2 and 3
- B1 and 2 only
- C1 and 3 only
- D2 and 3 only