FEEDBACK CONTROL SYSTEMS FINAL
PAPER TESTED QUESTIONS WITH VERIFIED
ANSWERS COMPLETE STUDY SHEET
●● Negative feedback
Answer: A primary mechanism of homeostasis, whereby a deviation in a
physiological variable from a set point that is being monitored triggers a
response that counteracts the initial fluctuation.
●● Negative feedback loop steps + drawing that using thermostat as an
example
Answer: state variable (temperature) to monitor sensor (temperature
sensor) which is sent the integrating center and compared to the set
point. IC then sends a signal to an effector (furnace for instance) which
changes the state variable to counteract any deviations from the set
point. loop continues on.
●● Draw a thermostat and label its part (sensor (state variable), set
point, and an integrating center + draw the graph of the feedback system
(thresholds, error, setpoint) . What type of feedback system is it?
Answer: An on-off negative feedback system.
●● Algorithm for on-off feedback systems (this is for a thermostat)
Answer: Below threshold off --> on and above threshold on --> off
, ●● integrating center
Answer: brain region that compares the actual value of a variable such
as body temperature to a particular value (like a set point or threshold)
●● What does the IC do if there is a deviation from the set point in a
negative feedback loop?
Answer: IC generates an error signal which drive effectors (organs) to
produce a response that opposes the deviation and pushes the variable
back to the set point
●● What does "negative refer to?
Answer: That the response works against that change that triggered it
●● Homeostasis
Answer: A constant internal state against change in environment and
activity
●● "Loop" refers to
Answer: sense, compare, correct
●● Positive feedback
Answer: Feedback response to a deviation that tends to magnify a
process or increase its output.
PAPER TESTED QUESTIONS WITH VERIFIED
ANSWERS COMPLETE STUDY SHEET
●● Negative feedback
Answer: A primary mechanism of homeostasis, whereby a deviation in a
physiological variable from a set point that is being monitored triggers a
response that counteracts the initial fluctuation.
●● Negative feedback loop steps + drawing that using thermostat as an
example
Answer: state variable (temperature) to monitor sensor (temperature
sensor) which is sent the integrating center and compared to the set
point. IC then sends a signal to an effector (furnace for instance) which
changes the state variable to counteract any deviations from the set
point. loop continues on.
●● Draw a thermostat and label its part (sensor (state variable), set
point, and an integrating center + draw the graph of the feedback system
(thresholds, error, setpoint) . What type of feedback system is it?
Answer: An on-off negative feedback system.
●● Algorithm for on-off feedback systems (this is for a thermostat)
Answer: Below threshold off --> on and above threshold on --> off
, ●● integrating center
Answer: brain region that compares the actual value of a variable such
as body temperature to a particular value (like a set point or threshold)
●● What does the IC do if there is a deviation from the set point in a
negative feedback loop?
Answer: IC generates an error signal which drive effectors (organs) to
produce a response that opposes the deviation and pushes the variable
back to the set point
●● What does "negative refer to?
Answer: That the response works against that change that triggered it
●● Homeostasis
Answer: A constant internal state against change in environment and
activity
●● "Loop" refers to
Answer: sense, compare, correct
●● Positive feedback
Answer: Feedback response to a deviation that tends to magnify a
process or increase its output.
