lecture1

lecture1 - Consider a Single-Cell Organism Directly Exposed...

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Unformatted text preview: Consider a Single-Cell Organism: Directly Exposed to Changing Environment-food source-temperature-pH-oxygen-toxins Lecture 1 physiology: it’s what keeps you alive! environment Multi-Cellular Organism-essentially no cells directly exposed to environment-the “environment” of the cells is the interstitial Fuid-multiple organ systems work together to keep the Multi-Cellular Organism-essentially no cells directly exposed to environment-the “environment” of the cells is the interstitial Fuid-multiple organ systems work together to keep the cell’s environment constant and optimal plasma interstitial fuid interstitial fuid intracellular fuid (blood) cell •the cells of the multicellular organism live in interstitial Fuid (it’s their environment) •the function of our organ systems is to optimize this Fuid plasma interstitial fuid interstitial fuid intracellular fuid •there is rapid equilibration oF most substances between the interstitial fuid and the plasma. Thus, their compositions are very similar. •the movement oF substances between the intracellular fuid and the interstitial fuid is tightly regulated. Their compositions are very diFFerent. (blood) cell cell cell cell cell cell Where is our body fuid? For your cells to function properly you must simultaneously regulate in the interstitial fluid: -O 2 and CO 2 concentrations (respiratory, circulatory)...
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This note was uploaded on 02/14/2011 for the course MCDB 111 taught by Professor Smith during the Spring '11 term at UCSB.

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lecture1 - Consider a Single-Cell Organism Directly Exposed...

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