### situation | equilibrium:

Homeostasis
* Some homeostasis depends on interaction.
* allows many organisms, such as humans, to survive in extreme environmental conditions.
* can occur at both the level of the cell and the level of the organism.
* central principle to the study of human physiology.
* characteristic of life because it process that occurs in all living things.
* comes into play as soon as the process of exsanguination begins.
* depends on the control and regulation of the organs and organ systems.
* dynamic state.
* enables species to occupy challenging environments.
* encompasses many body processes.
* group of system-stabilizing relations characterized by negative feedback.
* involve the influencing of the external environment.
* involves negative feedback mechanisms.
* is an important concept in physiology
  - the regulatory approach to motivation
  - one of the key concepts of biology
  - primarily renal, although control mechanisms are uncertain
* is the ability of the organism to maintain a relatively stable internal environment
  - body regulating the metabolism optimally
  - body's internal balance or equilibrium
  - central theme of physiology
  - chemical equilibrium of the body
  - fundamental concept in Physiology
  - maintaining of equilibrium varying about a mean
  - maintenance of a constant internal environment
* is the maintenance of a relatively constant internal environment
  - stable internal environmental
  - tolerable internal environment
  - viable internal environment
  - constant extracellular conditions within the body
  - relatively constant internal conditions
  - static conditions in the internal environment
  - the internal environment within specific limits
  - process of correcting imbalances
  - response to changing conditions that keeps the body in a stable state
  - system within our body that uses feed back to create a thermal balance
  - two people of the same sex living together
  - vital for survival
* is, therefore, a fitting framework for the introductory study of physiology.
* literally means same state, the desired state for a healthy plant.
* major aspect with regard to such interactions within plants as well as animals.
* natural event.
* principle of the universe.
* refers to maintenance of stable conditions in the internal fluid environment
  - metabolic balance maintained by several processes
* refers to the a. b. c. d. organization of cellular structures
  - dynamic constancy of the internal environment
  - maintenance of consistent internal body conditions
* regulates change.
* requires adjustment
  - constant adjustment
* state of stability and balance in the body's internal environment.
* very important process of the body of a mammal.

### situation | equilibrium:

Market equilibrium
* Think of there being only one bank that supplies and demands foreign exchange.
* is achieved when customer transaction expectations are fulfilled
  - at the intersection of the supply and demand curves
  - efficient because it generates the highest possible total market value
* occurs at the intersection of supply and demand.
* occurs at the intersection of the aggregate demand and supply curves
  - when the quantity demanded equals the quantity supplied
  - where quantity demanded equals quantity supplied
* reflects the way markets allocate scarce resources.

Static equilibrium
* exists when the line of gravity is within the base of support.
* occurs when there is no action taking place.

Thermal equilibrium
* assures that the implosion pressure is very uniformly distributed.
* exists if no heat flows between two objects which have a diathermic boundary.
* is an important concept in thermodynamics
* is the state of maximum entropy
  - subject of the Zeroth Law of Thermodynamics
  - when two systems reach same temperature
* occurs when two bodies have the same temperature.