HOMEOSTASIS

• Variables - Measures of body properties that may change in value Ex: - heart rate - Blood pressure - Blood glucose level
• Normal Range - A normal extent of increase or decrease around a set point.
• Set Point - Normal or average value of a variable overtime, body temperature fluctuates around a set point.
• Negative Feedback - Is the mechanism used for homeostatic regulation.
• Detection: of deviation away from set point and; - correction: reversal of deviation toward set point and normal range
• Positive Feedback - Mechanisms occur when the initial stimulus further stimulates the response
• Our average body temperature is 98.6 degrees Fahrenheit.
• A receptor monitors the value of a variable such as body temperature
• A control center, such as part of the brain, establishes the set point around which the variable is maintained through communication with the receptors and effectors
• An effector, such as sweat glands, can adjust the value of the variable, usually back toward the set point.
• A changed variable is a stimulus because it initiates a response. It is the one that is changed.
• Homeostasis is the condition in which body functions, body fluids, and other factors of the internal environment are maintained at levels suitable to support life.