a. In a negative-feedback control system, a change in the variable being regulated brings about responses that tend to push the variable in the direction opposite to the original change. Negative feedback minimizes changes from the set point of the system, leading to stability.
b. In a positive-feedback system, an initial disturbance in the system sets off a train of events that increases the disturbance even further.
PART TWO Biological Control Systems
PART TWO Biological Control Systems c. Homeostatic control systems minimize changes in the internal environment but cannot maintain complete constancy.
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This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.