Homeostasis is the process by which the body maintains relatively stable internal conditions despite changes inside or outside the body.
The body continuously regulates variables such as temperature, blood glucose, blood pressure, fluid balance, electrolyte concentrations, and blood acidity. This regulation usually involves sensors, control mechanisms, and responses that counter deviations from an appropriate range.
Homeostasis does not mean that body conditions remain completely constant. They normally fluctuate within controlled ranges.
QUICK FACT
Homeostasis is about maintaining a stable internal environment, not keeping every measurement at one fixed value.
COMMONLY CONFUSED WITH
- Equilibrium: a state of balance; biological systems often maintain dynamic regulation rather than true equilibrium.
- Adaptation: longer-term changes that help an organism function under particular conditions.
SEE ALSO