The human body works best at 37°C, with a 0.1% blood sugar level and a blood pH level of 7.35
The external environment and making demands on your body do not always provide the ideal conditions for life
Your body must adjust these variations to maintain a stable internal environment
Homeostasis is a term used to describes the body’s attempt to adjust to a fluctuation external environment
Homeostasis is maintained through constant monitoring and feedback about body conditions
Homeostatic control systems require:
-a monitor; receptors signal the coordination centre when internal environment levels move away from normal limits
-a coordination centre; relay information to the appropriate regulator
-a regulator; helps to restore the normal balance
Feedback Systems
Negative Feedback Systems:
-make adjustments to bring the body back within an acceptable range
-ex. A household thermostat
Positive Feedback Systems:
-move the controlled variable even further away from a steady state
-ex. The human birth process
