BIOL 201 Lecture Notes - Lecture 20: Cytoskeleton, Cell Membrane, Cytokinesis
27 Nov 2015
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Document Summary
Muscles are shaped as long, slender tubes with the ability to contract into smaller, thicker tubes. Cells with the most elaborate shape are neurons: polarized and elongated shape, dendrites receive signals from neighbouring neurons, axon protrudes to areas where signals are sent. Cells in the body all have the same genes. Often have individual domains with the ability to segregate components in the cell. Components inside the cell must be transported out of the membrane. Cells can internalize the cargo as well. Skin cells on a dish placed on a surface move around. Cells construct an internal skeleton called the cytoskeleton The cytoskeleton plays key roles in cell physiology and metabolism: shape, structure, and stability. Cells may deform but will return to their original shape: responsible for intracellular transport, enables spatial organization in the cell, responsible for the contraction of muscles and motility of cells, e. g. migration of cells during wound-healing.
