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Transport in Plants

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Biology

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Biology

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
Difference between semipermeable and selectively permeable membrane

Semi-permeable membrane permit the movement of solvent molecules only through them, but prevent 
the movement of salute particles. e.g egg membrane, animal bladder, parchment paper.

Selectively or Differentially permeable membranes allow selective passage of solutes along 
with solvent, through them. Example Plasma membrane of the cell. 
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What is transmembrane pathway ?

The movement of water through cell membranes is called trans membrane pathway.
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Why the cortex produces no resistance to movement of water ?

The cortical cells are loosely packed and produce no resistance to movement of water via cell walls or apoplast.
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Give the term for the ability to resist a pulling force.

Tensile strength
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Who introduced the apoplast—symplast concept ?

E. Munch (1930).
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Why the water is forced to move through cell membrane beyond endodermis ?

Water is forced to move through cell membranes beyond endodermis because of the suberin (waxy substance) present on radial walls of endodermal cells blocks water and solute movement through cell walls of endodermis. 
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