101Lecture02_2009

101Lecture02_2009 - Lecture Topic 2 Homeostasis: A Primary...

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Lecture Topic 2 Homeostasis: A Primary Concept in Physiology The Plasma Membrane Membrane Potential Homeostasis • The maintenance of a relatively constant internal environment • This common goal drives nearly all physiologic functions • The internal environment: –Blood/plasma –Intersitial/extracellular Fuid –Brain EC±
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Nearly All Systems Are Involved with Homeostasis Figure 1.7 Figure 1.8
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The Plasma Membrane Separates Two Environments Figure 3.3 The Lipid Bilayer of the Plasma Membrane Figure 3.2
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The Lipid Bilayer of the Plasma Membrane Figure 3.2, 3.3 Plasma Membrane Proteins Perform Various Jobs • Integrated with the membrane • Several types of association: – Spanning – One one face or the other Figure 3.3
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Some Proteins Allow Transport • Important for hydrophilic molecules • Channels – Membrane spanning – Ion speciFc (usually) – Create a water-Flled pore – ±acilitated diffusion Some Proteins Allow Transport ±igure 3.14
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Some Carrier Proteins Use Energy • The Na/K ATPase is an example Some Carrier Proteins Use Energy Figure 3.16
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This note was uploaded on 04/14/2009 for the course NPB 2 taught by Professor Bautisca during the Spring '09 term at UC Davis.

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101Lecture02_2009 - Lecture Topic 2 Homeostasis: A Primary...

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