In terms of efficacy, there can be three types of interactions between medications: additive, synergistic, and antagonistic. 1  Additive interaction means the effect of two chemicals is equal to the sum of the effect of the two chemicals taken separately. This is usually due to the two chemicals acting on the body via same or similar mechanism. Examples are aspirin and motrin, alcohol and depressant, tranquilizer and painkiller.
Save. clean kitchen image by easaab from Fotolia.com. A refrigerator thermostat has only one function -- controlling the refrigerator's cooling system by turning it on or off to ensure that the temperature inside the fridge stays in the correct range of 33 to 40 degrees Fahrenheit.In frost-free models, a separate thermostat with a timer controls the defrosting cycle.ave. clean kitchen image by easaab from Fotolia.com. A refrigerator thermostat has only one function -- controlling the refrigerator's cooling system by turning it on or off to ensure that the temperature inside the fridge stays in the correct range of 33 to 40 degrees Fahrenheit.
Such functions include blood pressure, body temperature, respiration rate, and blood glucose (sugar) levels. The normal range of values for any one of these functions is called a set point. Homeostasis insures that vital functions remain close to their set point in spite of any changes in external conditions. For instance, suppose that a child leaves a warm house to go out-side to play when the temperature is 32Â°F (0Â°C).