Homeostasis Flashcards
It refers to a state of constancy in a system.
Homeostasis.
A system is in homeostasis in its _ state.
resting
A system restores homeostasis when…
an event that disrupts the normal state occurs.
_ refers to _ as maintaining a constant internal environment.
Physiologists, homeostasis
It makes adjustments to lessen the internal impact of major external disturbances.
Homeostatic system.
It is the internal environment of an organism, or the extracellular fluid environment.
Internal milieu.
The _ environment surrounds cells, exchanges _ and _, and acts as a _.
fluid, nutrients, wastes, buffer
Cells are the building blocks of life.
False. Simplest unit of life.
_ make up _ _; _ _ maintain _; and _ is necessary for healthy _.
Cells, body systems; body systems, homeostasis; homeostasis, cells
Each cell contributes to the maintenance of homeostasis and each cell is dependent on the overall maintenance of homeostasis.
True.
Three characteristics of cells:
- Cells need a constant internal environment.
- Cells obtain nutrients from, and remove wastes to, the internal milieu.
- Cells have specialized functions that contribute to homeostasis.
Claude Bernard (1813-1878).
- French physiologist.
- Developed the concept of the internal milieu.
- Recognized that many animals regulate their internal environment even if the external environment changes.
Walter Cannon (1871-1945).
- Coined the term “Homeostasis” in 1926.
- Realized the importance of the autonomic nervous system in maintaining a constant internal
environment.
Examples of physiological conditions requiring homeostasis:T.CWP.GE.P.ER.W/IB.V/P
- Temperature
- Concentration of Waste Products
- Gas Exchange
- pH
- Energy Requirements
- Water/Ion balance
- Volume/Pressure
Conformers use behavioral and physiological mechanisms to buffer external changes and thus, maintain a constant internal environment.
False. Regulators.
