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