Physiology 2130 Lecture Notes - Lecture 1: Body Fluid, Blood Plasma, Thermostat

• School: Western University
• Department: Physiology
• Course: Physiology 2130
• Professor: Christine Bell

Document Summary

Objectives: define physiology and homeostasis, describe the negative feedback control system, list the levels of organization in the human body. Problem faced by the body and its cells is how to surround themselves with barriers that allow desired substances to enter and waste to exit while maintaining their internal environments. Explores mechanisms in which organisms control their internal environment regardless of what occurs in outside/ external environment. Attempts to explain the physical and chemical factors responsible for both normal function and disease (aka pathology) Internal environment fluid in which cells of our body are bathed consist of intestinal fluid and blood plasma. Includes contents and space of digestive, respiratory, and urogenital tracts. Homeostasis is the maintenance of relatively stable conditions within the internal environment regardless of what is happening in external environment. The body maintains homeostasis using negative and positive feedback control mechanisms. Performs various tasks from maintaining body temperature to maintaining body fluid volumes.