how would you describe the swelling of piece of wood when placed in water
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Answered by
60
hey your ans is here
___________
Answer:- This is because of the process of IMBIBITION
What is imbibition?
Answer:- it is a phenomenon by which the living or dead plant cells absorb water by surface attraction
Substances that are made of cellulose it proteins have strong affinity for water so they imbibe water or moisture and swell up
Examples:- wooden doors , dry seeds
__________
___________
Answer:- This is because of the process of IMBIBITION
What is imbibition?
Answer:- it is a phenomenon by which the living or dead plant cells absorb water by surface attraction
Substances that are made of cellulose it proteins have strong affinity for water so they imbibe water or moisture and swell up
Examples:- wooden doors , dry seeds
__________
Answered by
10
Translocation : Transport of substances in plants over longer distances through the vascular tissue (Xylem and Phloem) is called translocation.
Means of transport : The transport of material into and out of the cells is carried out by a number of methods. These are diffusion, facilitated diffusion and active transport.
Diffusion : Diffusion occurs from region of higher concentration to region of lower concentration across the permeable membrane. It is passive and slow process. No energy expenditure takes place.
Facilitated diffusion : The diffusion of hydrophilic substances along the concentration gradient through fixed membrane transport protein without involving energy expenditure is called facilitated diffusion. For this the membrane possesses aquarporins and ion channels. No energy is utilized in this process.
Methods of Facilitated Diffusion :
Some carrier or transport proteins allow diffusion only if two types of molecules moves together.Symport: both molecules cross the membrane in the same direction.Antiport: both molecule moves in opposite direction.Uniport: one type of molecule moves across the cell membrane.
Active transport :
Active transport is carried by the movable carrier proteins (pumps) of membrane.Active transport uses energy to pump molecules against a concentration gradient from a low concentration to high concentration (uphill-transport).It is faster than passive transport.
Water potential :
Water molecule possesses kinetic energy.The greater the concentration of water in a system, the greater is its kinetic energy or water potential.Pure water has the highest water potential.Water always moves from higher water potential to lower water potential.
hence we can also say that the swelling of wood when placed in water is not its actual growth hope it helps the above are some important points to remember
Means of transport : The transport of material into and out of the cells is carried out by a number of methods. These are diffusion, facilitated diffusion and active transport.
Diffusion : Diffusion occurs from region of higher concentration to region of lower concentration across the permeable membrane. It is passive and slow process. No energy expenditure takes place.
Facilitated diffusion : The diffusion of hydrophilic substances along the concentration gradient through fixed membrane transport protein without involving energy expenditure is called facilitated diffusion. For this the membrane possesses aquarporins and ion channels. No energy is utilized in this process.
Methods of Facilitated Diffusion :
Some carrier or transport proteins allow diffusion only if two types of molecules moves together.Symport: both molecules cross the membrane in the same direction.Antiport: both molecule moves in opposite direction.Uniport: one type of molecule moves across the cell membrane.
Active transport :
Active transport is carried by the movable carrier proteins (pumps) of membrane.Active transport uses energy to pump molecules against a concentration gradient from a low concentration to high concentration (uphill-transport).It is faster than passive transport.
Water potential :
Water molecule possesses kinetic energy.The greater the concentration of water in a system, the greater is its kinetic energy or water potential.Pure water has the highest water potential.Water always moves from higher water potential to lower water potential.
hence we can also say that the swelling of wood when placed in water is not its actual growth hope it helps the above are some important points to remember
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