Question

define the following
a) imbibition
b) diffusion
c) osmosis
d) osmotic pressure
e) active transport
f) tonicity
g) root pressure​

Answer 1

Answer:

a)  Imbibition - Imbibition is a special type of diffusion that takes place when water is adsorbed by solids-colloids causing an increase in volume.

b) Diffusion - Diffusion is the net movement of anything from a region of higher concentration to a region of lower concentration.

c) Osmosis - Osmosis is the spontaneous net movement of solvent molecules through a selectively permeable membrane into a region of higher solute concentration, in the direction that tends to equalize the solute concentrations on the two sides

d) Osmotic pressure - Osmotic pressure is the minimum pressure which needs to be applied to a solution to prevent the inward flow of its pure solvent across a semipermeable membrane.

e) Active transport - In cellular biology, active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration—against the concentration gradient.

f) Tonicity - Tonicity is a measure of the effective osmotic pressure gradient; the water potential of two solutions separated by a semipermeable cell membrane. In other words, tonicity is the relative concentration of solutes dissolved in solution which determine the direction and extent of diffusion.

g) Root pressure - 'Root Pressure' is the transverse osmotic pressure within the cells of a root system that causes sap to rise through a plant stem to the leaves.

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