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AP 151 Introduction to Human Physiology

1-2. Physiology. Considers the operation of specific organ systemsRenal ? kidney functionNeurophysiology ? workings of the nervous systemCardiovascular ? operation of the heart and blood vesselsFocuses on the functions of the body, often at the cellular or molecular levelUnderstanding physiolo

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AP 151 Introduction to Human Physiology

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    1. 1-1 AP 151 Introduction to Human Physiology Chapter 1 HOMEOSTASIS

    2. 1-2 Physiology Considers the operation of specific organ systems Renal kidney function Neurophysiology workings of the nervous system Cardiovascular operation of the heart and blood vessels Focuses on the functions of the body, often at the cellular or molecular level Understanding physiology also requires a knowledge of physics, which explains electrical currents, blood pressure, and the way air pressure allows the movement of air into and out of the lungs

    3. 1-3 Approaches to Physiology Mechanistic approach - asks how a function occurs How do red blood cells carry oxygen? Teleological approach - asks why a function occurs Why do red blood cells carry oxygen?

    4. 1-4 Body Environments and Fluids External environment The air in which we live Body fluids - two major compartments Intracellular fluid - cytosol; fluid within cells (28 L=67%) Extracellular fluid - all fluid outside cells of the body Plasma - liquid component of blood (3L=7%) Interstitial fluid - aka, tissue fluid; fluid bathing cells (11L=26%) Claude Bernard called this the milieu interieux; the internal environment. There is a constant interaction between these 3 fluids They are separated form one another only by cell membranes Therefore, changing one (especially tissue fluid) has effects on the other two

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