How do microorganisms and your cells move? Cell Motility How do microorganisms and your cells move?

First, Some motivation Deep within the Pond water, lies a secret! http://www.youtube.com/watch?v=0-6dzU4gOJo

How cell motility Works Cell motility (movement) is mainly driven by a network of actin in the cell membrane. This network is controlled by the Cytoskeleton ACTiN is a protein that contracts through Polymerizaton It relaxes through depolymerization

What you’re doing Type of Movement Description Example Picture Watch the video on the types of cell movement This is what you describe and Draw. Type of Movement Description Example Picture

Movement Type #1- Pseudopodia Definition – a temporary protrusion or retractile process of part of the cell’s cytoplasm Example - amoeba Amoeba in motion http://www.youtube.com/watch?v=7pR7TNzJ_pA Amoeba eats Two paramecium: http://www.youtube.com/watch?v=pvOz4V699gk

Movement Type #2 – Flagellar movement Definition – slender, whip-like appendage that helps microorganisms to move Example – Euglena, sperm cells Movement of Euglena in Phase Contrast http://www.youtube.com/watch?v=jl0TzaWUQWk Two organisms using Flagella http://www.youtube.com/watch?v=Md0PtdRxXvw

Movement Type #3 - Cilia Definition – minute, hair-like structures that often surround the cell like a fringe Example – Paramecium, lung cells Paramecium eating and moving http://www.youtube.com/watch?v=a4aZE5FQ284 Wave of cilia http://www.youtube.com/watch?v=j3CuqRDGPmU