Physiology 2130 Lecture Notes - Extracellular Fluid, Negative Feedback, Blood Plasma

• School: Western University
• Department: Physiology
• Course: Physiology 2130
• Professor: Anita Woods

Document Summary

Physiology is the study of functions in living organisms. Explores the mechanisms by which the organisms control their internal environments regardless of what happens outside in the external environment. Explains physical and chemical factors responsible for both normal function and disease (pathology) Internal environment: is the fluid in which the cells of the both are bathed. Ex: space and contents of the digestive, respiratory, urogenital tracts, lungs. Contains: set point, control centre (integrator, effector, controlled variable, sensor (receptor) Found throughout the body and perform different functions such as maintaining body temperature and maintain body fluids. The controlled variable eventually shuts off its own production. Example: body temperature dropping from set point (cold: set point for body temperature is 37 degree celsius (body wants to maintain) Example: body temperature rises (hot: the nervous system would signal the hypothalamus which would signal blood vessels near the skin to dilate and sweat glands to sweat until the heat dissipates from your body.