Amoeboid movement, Biology

Amoeboid Movement

Amoeboid movement is the characteristic of some protozoans, slime molds and vertebrate white blood cells. The movement of these is due to cytoplasmic streaming, change in cell shape and extension of pseudopodia. These changes are easily observed under the microscope, but the mechanisms involved in activating the movement are not well understood. When an amoeba has to move. it stretches its arm-l.ike extensions, the pseudopodia, into the required direction and its cytoplasm flows into the newly formed pseodopodia. The newly formed pseudopodia gradually extend and enlarge so that the entire cell occupies the space where previously only a small pseadapodium began to form.

As the cell moves, new pseudopodia are formed in the direction of the movement, while the posterior parts are withdrawn. It is not known with certainty how the extending and retracting of the pseudopodia takes place. It appears that there is a transaction of the regions of the cytoplasm from fluid-like sol to semi solid gel state. Now we shall study how amoeboid movement is accomplished by transactions of cytoplasm from sol to gel state.

Posted Date: 1/16/2013 3:59:44 AM | Location : United States

Related Discussions:- Amoeboid movement, Assignment Help, Ask Question on Amoeboid movement, Get Answer, Expert's Help, Amoeboid movement Discussions

Write discussion on Amoeboid movement
Your posts are moderated
Related Questions
Define Precautions for Simple Staining of Bacterial Cultures? 1. Heat fix all the bacterial smears. 2. Use clean, grease free glass slides. 3. Wash the stained slide gent

how conjugation takes place in paramecium

VENOU S SYSTEM It is collecting system formed by the uniting branches as smaller and then larger veins and venacava leading to the heart. Blood from anterior part of the

Posterior Maxilla Posterior maxilla has very poor quality of bone demanding special consideration in implant placement:  Increasing the number of implants to decrease the cr

Explain Alkaline Butt -carbohydrate utilization pattern test? Alkaline slant (red) and alkaline butt (red) or no change (orange-red) butt- Instead of carbohydrates, peptone in

Gel shift assay is a technique by which one can determine whether a particular protein preparation contains factors which bind to the specific DNA fragment. At times when a radiol

A 37-year old woman is admitted to the hospital after complaining of chest pains. She admits to having had severe headaches for several days prior to seeking medical help. She is a

What are some human diseases caused by virus and what are their respective modes of transmission? The main viral diseases transmitted by respiratory secretions (cough, sneezes)

L A W S OF CLEAVAGE - 1. Sac's Law - According this law, during cleavage each blastomere to form similar blastomere. New cleavae always take place at the right angle of th