Name the major sets of internal factors which determine the value of water potential.

Explanation

### Step-by-Step Solution:

1. **Understanding Water Potential**: Water potential is a measure that indicates the potential energy of water in a system, influencing the movement of water. It is affected by various internal factors within the plant.

2. **Identifying Internal Factors**: The major internal factors that determine the value of water potential are:
- **Solute Potential (Ψs)**: This factor arises from the presence of solutes in the water. When solutes are added to water, they bind with water molecules, reducing the concentration of free water molecules. This results in a decrease in water potential. Solute potential is typically negative, as the addition of solutes lowers the potential energy of the water.

- **Pressure Potential (Ψp)**: This is the physical pressure exerted by the fluid in the plant cells. It is usually positive and contributes to the overall water potential by pushing water against the cell walls, which can help maintain turgor pressure in plant cells.
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