How Do Amoebae Move by Crawling Over a Surface

Question

How do Amoebae move by crawling over a surface?
A)Growth of actin filaments form bulges in the plasma membrane.
B)Microtubule extensions are set up that vesicles can follow.
C)Pseudopods are reinforced with intermediate filaments.
D)use of cytoplasmic streaming
E)Intermediate filaments condense and decondense in the direction of travel.

Accepted Answer

Amoebae move by extending and retracting parts of their cell membrane, called pseudopodia. The extension is due to the growth of actin filaments, which form bulges in the plasma membrane. The cytoplasm then streams into these bulges, pushing the cell forward. The retraction is due to the disassembly of actin filaments and a decrease in cytoplasmic pressure. This cycle of extension and retraction allows amoebae to crawl over a surface.