E109_Lecture01_Homeostasis_PDF.pdf - MM1 LARC Learning Academic Resource Center SESSIONS AVAILABLE Human Physiology Monday Wednesday 12:00-12:50 PM

E109_Lecture01_Homeostasis_PDF.pdf - MM1 LARC Learning...

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9/27/2019 1 Human Physiology Bio E109 Fluid Compartments & Homeostasis LARC: Learning Academic Resource Center Tutorial Leader: Mai Makhlouf SESSIONS AVAILABLE: Monday/ Wednesday: 12:00-12:50 PM Monday/ Wednesday: 1:00-1:50 PM Monday Wednesday: 2:00- 2:50 PM Monday/ Wednesday: 4:00- 4:50 PM Monday/ Wednesday: 5:00-5:50 PM More Information : Sign Up : enroll.larc.uci.edu MM1 iClicker Practice Question What is your favorite Halloween movie? A) Nightmare Before Christmas B) It’s the Great Pumpkin, Charlie Brown! C) Hocus Pocus D) Beetle Juice Intro to Physiology and Homeostasis Physiology Function Communication Nervous communication Humoral communication Cell-to-cell communication
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Slide 2 MM1 Mai Makhlouf, 9/26/2019
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9/27/2019 2 Homeostasis The internal environment is maintained within a ”range” of values rather than an exact fixed value. Disturbance in homeostasis results in compensatory mechanisms Successful restoration or Internal vs. external disease Ex. Diabetes mellitus Figure 1.4 Homeostasis Organism in homeostasis External change Internal change results in loss of homeostasis Compensation succeeds Compensation fails Wellness Illness or disease Organism attempts to compensate Internal change Homeostasis Homeostasis – requires integrated communication and function Dynamic drive to achieve a constant ”internal environment or milieu” Internal milieu – extracellular composition , volume, pressure, and temperature Internal environment = internal milieu = extracellular fluid = “ the environment surrounding the cell Claude Bernard Internal Environment Effect of External Environment on Internal Early invertebrate model Terrestrial organisms Balancing water loss with appropriate water intake “Internal Environment” Watery internal environment surrounding cells Extracellular fluid (ECF)
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9/27/2019 3 Fluid Compartments
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