Lecture3 - Subcellular Structures

Lecture3 - Subcellular Structures - Subcellular Structures...

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Subcellular Structures Cells - Basic Biological Unit - Structure enclosed by lipid bilayer membrane ; ~1 - 40µm in diameter - Contain subcellular structures ( organelles ) that perform discrete functions - Main themes: energy, communication, homeostasis - Cells have needs in common: o Need to generate an utilize chemical energy o Ability to sense and respond acutely to surrounding conditions o Ability to access stored information for longer-term changes in characteristics o Ability to interact physically with non-cellular components of their surroundings o Have structures to support these needs - Cells differ in: o Function, size, shape, polarity, tissue adherence, responsiveness to specific stimuli o Capacity to replicate by mitosis (cell division) o Lifespan o Information retrieval and response to extracellular signals are tailored to differentiated function. - Lifecycle: o Start off as Stem Cells Undifferentiated, but have the ability to specialize under proper conditions. Capable of self renewing o Stem Cells Differentiate into Specialized cells o Specialized cells eventually die. Subcellular Structures:
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This note was uploaded on 04/06/2008 for the course BMVS 4064 taught by Professor Dr.lee during the Spring '08 term at Virginia Tech.

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Lecture3 - Subcellular Structures - Subcellular Structures...

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