Types of amoeboid movements, Biology

Types of Amoeboid Movements

As the amoeba's cell body throws out one or a few pseudopodial lobes, a temporary rear end or uroid is pulled along. The central, more fluid protoplasm, the endoplasm flows -towards the extending pseudopodium, the advancing tip of which appears a thicker gel, the ectoplasm. During the amoeboid movement, the sol-like endoplasm is converted into gel like ectoplasm at the advancing tip of the pseudopodium; a reverse process simultaneously occurs at the.uroid end where the gel changes into sol. At some point the pseudopodium gets attached to the substratum and the cell is moved forward.

1063_Types of Amoeboid Movements.png

Figure: Amoeboid locomotion in different amoebae.

It is also a widely accepted view that the amoeboid movements depend on the contraction of cellular proteins which are comparable to those occurring in the muscle. Actin and myosin have been found to be present in amoeboid cells; tropomysin has also been demonstrated in some instances. Figure shows the various types of amoeboid movements.

Posted Date: 1/12/2013 5:49:20 AM | Location : United States







Related Discussions:- Types of amoeboid movements, Assignment Help, Ask Question on Types of amoeboid movements, Get Answer, Expert's Help, Types of amoeboid movements Discussions

Write discussion on Types of amoeboid movements
Your posts are moderated
Related Questions
Method for fractionation of subcellular organelles In order to study the composition and the metabolic role of the various subcellular organelles in a cell, it becomes necessar

Proteins of Animal Origin - Fish Fish: The edible portion is skeletal muscles of the body. Even though the skeletal muscles of different animals are basically similar, fish spe

As double-stranded DNA is heated a temperature is reached at that the two reaction strands divided.  This procedure is called as denaturation.  The temperature at that half of the

how pollination occurs in Salvia?

This method is used for the desalination of water i.e., for the removal of dissolved mineral salts, acids, alkalis and also the radioactive substances from the effluents. Electro d

What are the three periods into which interphase is divided? Interphase is the preceding phase to the mitotic division. It is separated into three periods, G1, S and G2 (the l

Define Antioxidant Activity of manganese? As Mn is a component of mitochondrial Superoxide Dismutase (SOD), it can protect against oxidative damage. In-vitro experiments have i

Class adverse effects of NNRTI All NNRTIs can cause a rash that is sometimes severe. NNRTIs are metabolized by and can affect hepatic CYP 450 isozymes; drug interactions can o

Q. What are persistent organic pollutants (POPs)? The POPs, or persistent organic pollutants, are toxic substances formed from organic compounds. The POPs are made in several i

Define Limitations of Agar Syringe or Agar Sausage Method? (i) It is applicable to surfaces with low contaminants. (ii) Problem of spreading colonies may occur. (iii) Col