Question

Root pressure, transpiration pull, turgor pressure, cappilary force

Answer 1

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1. 'Root Pressure'. It is the transverse osmotic pressure within the cells of a root system that causes sap to rise through a plant stem to the leaves. Root pressure occurs in the xylem of some vascular plants when the soil moisture level is high either at night or when transpiration is low during the day
2. Transpiration Pull. A transpiration pull could be simply defined as a biological process in which the force of pulling is produced inside the xylem tissue. This force helps in the upward movement of water into the xylem vessels. In this process, loss of water in the form of vapours through leaves are observed.
3. Turgor pressure is the force within the cell that pushes the plasma membrane against the cell ... The pressure exerted by the osmotic flow of water is called turgidity. It is caused by the osmotic flow of water through a selectively permeable ... Turgor pressure also plays a key role in plant cell growth where the cell wall ...
4. Capillary action is the ability of a liquid to flow in narrow spaces without the assistance of, or even in opposition to, external forces like gravity

Answer 2

Answer:

Explanation:

Root pressure is osmotic pressure within the cells of a root system that causes sap to rise through a plant stem to the leaves. Root pressure is caused by active distribution of mineral nutrient ions into the root xylem. Without transpiration to carry the ions up the stem, they accumulate in the root xylem and lower the water potential. Water then diffuses from the soil into the root xylem due to osmosis. Root pressure is caused by this accumulation of water in the xylem pushing on the rigid cells. Root pressure provides a force, which pushes water up the stem to a certain level.

Transpiration pull is the force which aids in drawing the water upward from roots to leaves. In leaves, some amount of water is used for photosynthesis and excess water is released into atmosphere. Water molecules stick to one another through cohesion forming a column in the xylem. The negative pressure created by transpiration pull exerts a force on the water particles causing their upward movement in xylem.

Plant cells need turgor pressure to maintain their rigidity and sturdiness. This is what gives a plant the ability to grow and stand tall. When the concentration of solutes is higher outside the cell, the plant cell loses water and the plant wilts.

Capillary action is the movement of liquid along a surface of a solid caused by the attraction of molecules of the liquid to the molecules of the solid. ... Plants use capillary action to bring water up the roots and stems to the rest of the plant.