Plz check the concentration gradient. in option c 0.7-0.05= 0.65M.. ok

Explanation of Answer C for NEET Question on Cell Systems

The given table shows the properties of four cell systems A, B, C, and D. The question asks us to identify the cell system that has the highest concentration of solute in the extracellular fluid (ECF). The correct answer is C.

Electrochemical Gradient and Osmotic Pressure

Before we explain why the answer is C, it is essential to understand two concepts: electrochemical gradient and osmotic pressure.

Electrochemical gradient refers to the difference in the concentration of ions across a cell membrane, as well as the difference in the electrical charge across the membrane. This gradient is maintained by ion pumps and channels.

Osmotic pressure refers to the pressure exerted by water molecules as they move across a semipermeable membrane from an area of high water concentration to an area of low water concentration. Osmotic pressure is influenced by the concentration of solutes in a solution.

Explanation of Answer C

Now let's move to the explanation of why answer C is correct.

Cell system C has the highest concentration of solute in the ECF, which is 0.65 M. This high concentration of solute creates a high osmotic pressure in the ECF, which draws water out of the cells and into the ECF. This results in a low water concentration in the ECF and high water concentration in the cells, creating a high electrochemical gradient. This gradient is maintained by ion pumps and channels.

In contrast, cell systems A, B, and D have lower concentrations of solute in the ECF, resulting in lower osmotic pressure and less water movement across the membrane. This creates a lower electrochemical gradient.

Therefore, the correct answer is C, as it has the highest concentration of solute in the ECF, resulting in the highest osmotic pressure and the highest electrochemical gradient.

In conclusion, understanding the concepts of electrochemical gradient and osmotic pressure can help you solve questions related to cell systems and their properties.