BIOL 130 Lecture Notes - Lecture 11: Fluorescence Microscope, Super-Resolution Imaging, Confocal Microscopy
Document Summary
Cytoskeleton helps give structure to the cell and organize the cytoplasm/organelles: allows to connect with other cells, 3 major components. Microtubules (mt) radiate outward from the cell. Composed of alpha and beta tubulin monomers. Alpha and beta come together to make hollow tube. Are rigid-> gives cells rigidity (no flexible: act like beams in cell. 2 different monomers has a plus and minus end: most growth occurs at plus end. Are dynamic important for cells to quickly react to their environment. They grow out and then they immediately fall back. Microfilaments (actin) forms a circular structure of the cell. Intermediate filaments (ifs) found at edges of cells: dynamic structures. Allows cells to constantly change shape: functions. Of organelles and components within the cytosol. Centrosomes/centrioles microtubules are anchored at the minus end on centrosomes: 2 centrioles in a centrosome, each centriole is an arrangement of 9 x 3 (27) microtubules, found in animal cells, centrosomes are near the nucleus.
