BIOL123 Lecture Notes - Lecture 5: Pseudopodia, Basal Body, Cell Membrane

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17 Jun 2018

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• Intermediate filaments

• Intermediate thickness

• Serve to strengthen the cell

• Function: enable cells to withstand mechanical stress when cells are

stretched

•

· Cell movement using flagella, cilia and pseudopodia

• Flagella (flagellum)

• Made of microtubules

• Propels sperm

• Designed to move the entire cell

• Cilia (cilium)

• Made of microtubules

• Hairlike structures about 0.25μm in diameter

• Covered by plasma membrane

• Extend from the surface of eukaryotic cells

• Contains a core of stable microtubules arranged in a bundle that grow

from cytoplasmic basal body which serves as an organising centre

• Beat in a whip-like fashion

• Moves fluid over the surface of a cell

• Propels single cells through a fluid

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