Anticonvulsants Yacoub Irshaid MD, PhD, ABCP Department of Pharmacology.
Cytoplasm and Cytoskeleton By: Tim Yacoub and Lizette Magdaleno.
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Transcript of Cytoplasm and Cytoskeleton By: Tim Yacoub and Lizette Magdaleno.
Cytoplasm and Cytoskeleton By: Tim Yacoub and Lizette Magdaleno
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
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.
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
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
Cytoplasm Overview Cytoplasm is “the contents of the cell
bounded by the plasma membrane, in eukaryotes, the portion exclusive of the nucleus.” (G-9)
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
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
Cytoplasm: Zones Plasmogel- peripheral zone of
cytoplasm that is thick and jelly- like
Plasmosol- zone is thin and liquefied
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