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The stomata are controlled by a pair of guard cells, which are specialized parenchyma cells. When it is humid and bright outside, a proton pump expels protons from the guard cells, causing a depolarization in the cells. This opens voltage-gated channels, and allows an uptake of Potassium ions to keep the cells open. Negative ions balance the influx of Potassium to maintain the negativity. If Chlorine ions also enter, the osmotic pressure changes, which increases the turgor pressure. The resulting turgor pressure helps keep the pore open as well.
Wiki User
∙ 14y ago
Wiki User
∙ 15y agoThe stoma of leaves are opened to allow CO2 to go in so that photosynthesis can be performed and to allow O2 to be released. The stoma are closed to prevent the plant from losing too much water.
Wiki User
∙ 14y agoThe Stoma on a plant are usually open during the day because the sunlight is absorbed in the guard cells, which control the opening and closing of the stoma.
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What part of the plant absorbs CO2?
each and every cell
What's the funcion of the stoma and the guard cells in plant leaves?
Guard cells are able to control how open or closed stomata are by changing shape. The gas exchange occurs when stomata are open facilitates photosynthesis
What surrounds the stoma of a plant?
Guard cells are what surround stomata.
What are small opening on the undersides of leaves through which carbon dioxide enters plant?
Stoma (or plural form stomata for a number of stoma)
A small hole through which water and gases pass in and out of a plant?
stoma
What part of the plant absorbs CO2?
each and every cell
What plant parts do all plants have?
stoma
What's the funcion of the stoma and the guard cells in plant leaves?
Guard cells are able to control how open or closed stomata are by changing shape. The gas exchange occurs when stomata are open facilitates photosynthesis
Why do plants close the stomata during the heat of the day?
Stomata, also known as stoma, close in hot weather to retain water. Even though open stoma are necessary for photosynthesis, they can dry out a plant. About 90% of water absorbed by a plant is lost through open stoma. The guard cells close the entrance for protection against dehydration.
What is the small opening in the underside of the plant?
Stoma or stomata
Is there a plant with a colored stoma that is easy to view?
none
What part of a plant controls evaporation?
Stoma of the leaf.
What part of a plant controls its evaporation?
Stoma of the leaf.
What surrounds the stoma of a plant?
Guard cells are what surround stomata.
What are small openings on the underside of the leaves through which carbon dioxide enters a plant?
Stoma (or plural form stomata for a number of stoma)
What are small opening on the undersides of leaves through which carbon dioxide enters plant?
Stoma (or plural form stomata for a number of stoma)
What is the word for plant pores?
Plant pores are called stomata (pl.) or stoma or stomate (sing.).
