Homeostatis: The Foundation of Physiology
Physiology
The study of function of living things
Emphasize purpose of a body process & the underlying mechanism by which the process occurs.
Teleological approach - Explains body function in terms of meeting a bodily need (WHY)
Mechanistic approach - Explaining the HOW of events occuring in the body
Anatomy - Closely interrelated with Physiology
The study of the structure of the body
Levels of organization in the body (Cells, Tissue, Organ, Body System, Organism)
On the chemical level, various atoms and molecules make up the body
Performing chemical reactions to provide energy for the cells
Cells perform basic functions: Obtaining food (nutrients) and oxygen (O2) from the environment surronding the cell
Eliminate waste products
Synthesized proteins and other components needed for cell structure
Respond in changes to surrondings
Reproducing
Controlling the exchange of materials between cells and external environment
Moving materials from one part of the cell to another
Specialized cell functions
Homeostasis (Factors Homeostatically Regulated/Contributions to the Body Systems to Homeostasis)
ICF (intracellular fluid) and ECF (extracellular fluid) - inside the cell and outside (still within the internal environment of the body)
Extracellular fluid - made of two components: plasma & interstitial fluid
Homeostatic Control operates locally (within organs) ot bodywide
Negative and Positive Feedback Systems