BIOL 1090 Lecture Notes - Disaccharide, Oligosaccharide, Glycolipid

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silverchimpanzee502

27 Apr 2012

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Highly complex and organized: many parts, organized with respect to time and space related to function little tolerance for error; fidelity of interactions maintained through control and regulation of parts. Accomplished by feedback loops, enzymes, etc. cellular organization is very consistent, and has been conserved through evolution: example: rat cell vs. corn cell are very similar (fig. Nuclear pore complex enables movement of molecules into and out of the nucleus cytoskeletal elements: actin microfilaments, intermediate filaments, microtubules, contribute to cell shape and movement, provide structural support, support transport of material. There are man membranes within a cell, including the outer plasma membrane. Plasma membrane cell boundary between the living and non-living site of interaction between the cell and its immediate environment control movement of material into/out of the cell allow response to external stimuli enable interactions between cells. Micrograph reveals that membranes are composed of two layers (bi-layer) all cell organelles are membrane-bound: different membranes suit organelles" unique functions.

Related Questions

Match each description or phrase with the correct cytoskeletal structure. Note that a cell type can be used more than once or not at all.

cellular contractions

intermediate filaments All cytoskeletal structures microtubule microfilaments None of these

flagellum movement

intermediate filaments All cytoskeletal structures microtubule microfilaments None of these

anchoring one cell to another

intermediate filaments All cytoskeletal structures microtubule microfilaments None of these

maintain cell shape

intermediate filaments All cytoskeletal structures microtubule microfilaments None of these

1. How does the extracellular matrix affect a cell that it surrounds? (Select all that apply.)

	The cell's shape depends in part on the structure and composition of the extracellular matrix.
	The genes that the cell expresses depend in part on the types of proteins in the extracellular matrix.
	The size that the cell grows to depends in part on the polysaccharides in the extracellular matrix.
	The extracellular matrix has no effect on the cells that it surrounds.
	All of these choices are correct.

2. Which of the following enable(s) the movement of cells?

	microtubules
	microfilaments
	intermediate filaments
	microtubules and microfilaments
	microfilaments and intermediate filaments

3. Microtubules increase in length:

	more quickly at one end than the other.
	by growing outward from the centrosome.
	in cycles, following rapid depolymerization.
	if free tubulin dimers are available.
	All of these choices are correct.

4. Dynamic instability is the rapid assembly and disassembly of:

	microfilaments.
	intermediate filaments.
	microtubules.
	both microfilaments and microtubules.

5. Which one of the following is a characteristic shared by integrins and cadherins?

	Both are peripheral membrane proteins.
	Both facilitate the adhesion of cells to extracellular matrix proteins.
	Both are present in adherens junctions, desmosomes, and hemidesmosomes.
	The cytoplasmic domains of both proteins are connected to the cytoskeleton.

6. Cadherin is an example of a(n):

	motor protein.
	intermediate filament protein.
	cell adhesion molecule.
	extracellular matrix protein.

7. Which is the CORRECT order from lesser to greater complexity for the following?

	organs, tissues, cells
	cells, tissues, organs
	tissues, organs, cells
	cells, organs, tissues

pucebear535

Explain how the arrangement of the cytoskeleton determines the cell's shape and polarity and provides organization and motility to its organelles.

Explain how microfilaments cooperate with microtubules and intermediate fibers in the normal functioning of cells. Explain how the cytoskeleton participates in the functional organization of tissues.Examine various types of adhesive molecules found on the surfaces of cells and in the surrounding extracellular matrix.

BIOL 1090 Lecture Notes - Disaccharide, Oligosaccharide, Glycolipid

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