Intro

-study of normal functioning (chem and physical processes) of a living organism and its component parts

study of entire populations of molecules

molecular, cellular, and physiological information

-structure and funciton are closely related
-living organisms need energy
-information flow coordinate body function
-homeostasis maintains internal stability

-molecular interactions
-compartmentation

function- explains what or why
process-explains how

the cause, set of causes, or manner of causation of a disease or condition
or
the investigation or attribution of the cause or reason for something

focus on function explaining the purpose

the process or mechanism describes the how

-regulation of the body's internal environment

-maintaining stable internal environment

Na and Cl are at high concentrations in the ECF and K is low
NA and CL are low in ICF and K is high

-input to body load must equal output to maintain constant level

regulated variables by control mechanisms

-local and reflux

-input signal
-integrating center
-output signal

local change-->cells in vicinity initiate response (no integrating center component)

systemic change sensed-->brain evaulates change and initiates response-->reflux response (initiated by cells at distant site)

long-distance

nervous and/or endocrine systems

-stimulus, sensor, input signal, integrating center, output signal, target, response

stabilizes variable

reinforces stimulus

feedforward control

normal range of function

release of oxytocin during childbirth, influences mooth muscle/leads to uterine contractions), resolution= delievery of baby (no pressure no more hormone)

complement and coagulation cascade

salivating at the thought of food

-regulated variables that create repeating patterns (circadium rhythum and cortisol levels/temperature)