Question

The diagram below illustrates substances crossing the selectively permeable membrane of different cells. Each example, A-F, shows not only different substances, but also different concentrations. Take note of the concentration inside the cell compared to the concentration outside of the cell and the direction of movement of the substance.
Figure 3-1

Diagram F in Figure 3-1 is an example of ____.
a.
diffusion
c.
osmosis
b.
active transport
d.
equilibrium


Please select the best answer from the choices provided

A
B
C
D

Answer 1

Answer:

D.

Explanation:

The direction of movement of water across selectively permeable membrane is depends on the relative concentration of water at two sides. If the concentration of water across the membrane is equal, then the two solutions are isotonic to each other. Thus, there is no concentration gradient. As a result, the water molecules will diffuse through the plasma membrane in both directions with the same rate. Therefore, no net movement of water into or out of the cell.

Answer 2

I do believe the answer is d. there is an equal amount of water on the inside and the outside.