How amoeba locomote by sol-gel theory?

Answer 1

hi friends this may help you,

Sol - gel theory is proposed by hyman . It helps some protozoans to move. it is basically consists of some steps which are as follows:-

1) The cytoplasm inside the cell is capable of changing into different forms i.e. from fluid to solid and vice versa. When the cytoplasm is in fluid state, it is known as plasma sol, and the more solid or gel like state is called the plasma-gel.

2)The interchange of plasma sol to plasmagel is known as Sol-Gel theory and is responsible for amoeba movement.

3) When the cytoplasm is in solid or gel like state, there is no locomotion. Movement takes place only when the cytoplasm is in fluid state. This way the amoeba "drags" itself and this movement is known as amoebic movement.

4)The locomotion in the amoeba is effected by the formation of temporary finger-like processes of pseudopodia (false-feet, greek, pseudos, false + podos, foot).

5)The plasma-sol changes into rigid plasmagel (gelates) at the anterior end and at the posterior end the plasma-gel changes into plasmasol (solates) causing a forward streaming of the more fluid plasma-sol.

6)That is why in actively progressing specimens the plasma-sol is continuously rapidly streaming forward, while the plasma-gel is practically everywhere at rest forming, so to say, a tube within which the plasma-sol flows.

7)It the course or a granule or crystal fairly straight course either until it reaches or nearly reaches the inner surface of the plasma-gel at the tip of an advancing pseudopod, then it deflects to the right or to the left, upward or downward and sooner or late, directly or indirectly comes into contact with plasma-gel into which it finally changes.

8)Other granules are similarly coming and changing it to plasma-gel after attaching to it behind the crystal under observation. As more of these are coming in the same way the position of the first recedes from the anterior and approaches the posterior end of the amoeba. When it reaches this end it gradually moves inward and enters in the plasma-sol, after which it moves forward and the whole processes is again repeated.

9)This gives an idea about the movement of the plasmasol and plasmagel. From this, the phenomenon of locomotion can be easily deducted.

****************************KEVIN (Jr M.P.L) KAKINADA A.P*************************