Question

explain the sol gel theory by taking example of pseudopodial movement in amoeba.​

Answer 1

Answer:

Locomotion of an amoeba is thought to occur due to the sol-gel conversion of the protoplasm within its cell. ... On the opposite (posterior) end of the cell, plasma gel is then converted to plasma sol and streamed toward the advancing pseudopodium.

Answer 2

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Sol-Gel Theory

Also known as Change in viscosity theory - Proposed by Hyman and detailed study by Pantin and Mast This theory suggest that pseudopodia are formed due to interconversion of sol. and gel.

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According to Mast endoplasm is divided into two parts:- Central part - Sol. and Peripheral - Gel In locomotion sol flows in the direction of locomotion and breaks the gel barrier. This sol strikes with the ectoplasm. After striking it moves on either side and converts into gel. In locomotion the gelation process occurs in front while solation (gel-sol) occur in rear outward. This process helps in pseudopodia formation. Pseudopodia is a tube like structure of ectoplasm in which endoplasm is filled. The wall of pseudopodia is made up of gel while sol is inside. Drawbacks : This theory do not explain the sol-gel interconversion. It does not mention about the force by which sol moves forward.

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