Two cells A and B are contiguous. Cell A has an osmotic pressure of 10 atm, turgor pressure of 7 atm, and diffusion pressure deficit of 3 atm. Cell B has an osmotic pressure of 8 atm, turgor pressure of 3 atm, and diffusion pressure deficit of 5 atm. The result will be:
Correct answer: C. Movement of water from cell A to B
- A. No movement of water
- B. Equilibrium between the two
- C. Movement of water from cell A to B
- D. Movement of water from cell B to A
Explanation
Diffusion pressure deficit is the reduction in the diffusion pressure of water in a system over its pure state. It is given by DPD = O.P - W.P (T.P). DPD determines the direction of net movement of water. It is always from an area or cell of lower DPD to the area or cell of higher DPD. So, cell A having lower DPD, water will move from cell A to B. So correct option is C.
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