Homeostasis

Homeostasis involves the coordination of organ systems to regulate factors like body temperature, blood pressure, blood sugar, water balance, and sodium levels.

Homeostasis is the state of regulated physiological balance.

Homeostatic mechanisms maintain homeostasis by the collaboration of nervous and endocrine systems.

Sensory receptors detect changes in the environment and transmit information to a control centre.

The control centre analyses the information and sends commands to effectors to maintain homeostasis.

Most homeostatic mechanisms operate through negative feedback loops.

Negative feedback restores the system to its set point by counteracting changes in the opposite direction.

Examples of negative feedback include a thermostat controlling room temperature and the body's response to changes in body temperature.

Positive feedback loops can also occur, amplifying disruptive influences.

Positive feedback is involved in processes like blood clotting, nerve signal transmission, and contractions during childbirth.

Excessive positive feedback, such as a high fever, can be dangerous and requires intervention.

Homeostasis doesn't mean constant conditions, but rather routine fluctuations within a normal range.

Strenuous exercise, for example, causes temporary increases in blood pressure and body temperature.

Homeostatic mechanisms work to maintain these fluctuations within a healthy range.