Cytoplasm and Cytoskeleton By: Tim Yacoub and Lizette Magdaleno.
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Transcript of Cytoplasm and Cytoskeleton By: Tim Yacoub and Lizette Magdaleno.
![Page 1: Cytoplasm and Cytoskeleton By: Tim Yacoub and Lizette Magdaleno.](https://reader036.fdocuments.in/reader036/viewer/2022082709/56649d0b5503460f949de3c9/html5/thumbnails/1.jpg)
Cytoplasm and Cytoskeleton By: Tim Yacoub and Lizette Magdaleno
![Page 2: Cytoplasm and Cytoskeleton By: Tim Yacoub and Lizette Magdaleno.](https://reader036.fdocuments.in/reader036/viewer/2022082709/56649d0b5503460f949de3c9/html5/thumbnails/2.jpg)
Cytoskeleton Overview Cytoskeleton is a “network of fibers that
extend[s] throughout the cytoplasm,”(113).
It’s three structures: microtubules, microfilaments, and intermediate filaments
It helps with the organization of activities, cell mobility, and structure of the cell
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Cytoskeleton: Microtubules In all eukaryotic cells, Shape: hallow tubes Made from protein called tubulin by centrioles Help shape and support the cell,
Compression-resistant, function as roads for mobile organelles to move along.
Aid in chromosome separation in cell division. Special arrangement of microtubules form
flagella and cilia.
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Cytoskeleton: Microfilaments In all eukaryotic cells, Shape: thin solid rods Made from a globular protein: Actin,
(twisted double chain of actin subunits). Functions as a tension bearer, networks
inside the plasma membrane to support cell shape, this layer is called a cortex.
Well known for its aid in cell movement, actin, along with Myosin interact, for example, to contract muscle cells
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Cytoskeleton: Intermediate Filaments Coiled cables, larger than microfilaments
but smaller than microtubules Made of several proteins similar to keratins Only in some animal cells , bears tension
(like microfilaments) More of a permanent structure within the
cytoskeleton Reinforces shape of cell, and anchors
certain organelles within the cytoplasm
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Cytoplasm Overview Cytoplasm is “the contents of the cell
bounded by the plasma membrane, in eukaryotes, the portion exclusive of the nucleus.” (G-9)
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Cytoplasm: Structure It is the Fluid where the cellular
organelles are suspended. It fills up all the spaces in the cell that
are not being filled by the organelles 3 Residents of Cytoplasm:
1.Cytosol 2.Organelles 3.Cytoplasmic Inclusions
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Cytoplasm: Characteristics Fluid substance that fills the space
between the cell membrane and cellular organelles
High percentage of water It is colloidal It contains proteins 90% water and 10% organic and
inorganic compounds
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Cytoplasm: Zones Plasmogel- peripheral zone of
cytoplasm that is thick and jelly- like
Plasmosol- zone is thin and liquefied
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Cytoplasm: Function Site of many biochemical reactions Place where cell expands and grows Provides a medium for organelles to
remain suspended Aids in movement of different cellular
elements Break down macromolecules Transport of genetic material