When Water Enters a Plant Cell Quizlet

Plant cells require water to survive and thrive, which means they have evolved to be able to absorb and store water. One of the most important things that happens when water enters a plant cell is that it causes the cell to become turgid, or swollen. This is because the water enters the cell and fills up the vacuoles, which are the large spaces in the center of the cell that are filled with water and other substances.

What Happens When Water Enters a Plant Cell?

When water enters a plant cell, it creates a concentration gradient. This is because there is more water outside the cell than inside, so the water moves into the cell in order to balance out the concentration. The water molecules move across the cell membrane through osmosis, which is the movement of water from an area of high concentration to an area of low concentration.

As the water continues to enter the cell, it creates pressure on the cell wall. This pressure is what causes the cell to become turgid. When the cell is turgid, it is rigid and has a firm structure. This allows it to support the plant, and is important for maintaining the shape of the plant.

The Role of Aquaporins in Water Absorption

Aquaporins are specialized channels in the cell membrane that allow water molecules to pass through. They are found in both animal and plant cells, but in plants they play a particularly important role in water absorption.

When water is scarce, the plant can increase the number of aquaporins in the cell membrane to allow it to absorb more water. This is important for plants that live in dry or arid environments, as it allows them to better survive during periods of drought.

Regulating Water Absorption

While water is essential for plant growth and survival, it is important for the plant to regulate the amount of water it absorbs. Too much water can actually be harmful to the plant, as it can lead to waterlogging, which can damage the roots and prevent the plant from absorbing nutrients.

Plants have several mechanisms for regulating water absorption, including the ability to close their stomata. Stomata are specialized pores in the leaves and stems of the plant that allow gas exchange to occur. When water is scarce, the plant can close its stomata to reduce water loss through transpiration.

Conclusion

When water enters a plant cell, it creates a concentration gradient that causes the water to move into the cell through osmosis. The water fills up the vacuoles in the cell, causing it to become turgid and provide support for the plant. Aquaporins play a key role in water absorption, and the plant regulates the amount of water it absorbs to prevent damage from waterlogging. Understanding how water is absorbed by plant cells is essential for understanding plant growth and survival.