Q: Which equation best represents the relationship between the measured variable, set-point, and error signal in a feedback system?

$\text{Error} = \text{Set Point} - \text{Measured Value}$

Question 1

Based on the feedback loop shown in the first image, which component is responsible for comparing the measured temperature to the target temperature in a home heating system?

Accepted Answer

Thermostat

Question 2

In the home heating system model, at what temperature does the furnace typically turn on and off if the target temperature is set to 23°C?

Accepted Answer

Turns on at 22°C, turns off at 24°C

Question 3

Which of the following systems operates by a feedback mechanism, as described in the study materials?

Accepted Answer

Human body temperature regulation

Question 4

In the general homeostatic feedback loop, what is the correct order of the three main components?

Accepted Answer

Sensor, Control Center, Effector

Question 5

A stimulus causes blood pressure to drop. Which component of the feedback loop detects this change?

Accepted Answer

Sensor (Receptor)

Question 6

What do the solid arrows in the feedback loop diagram represent?

Accepted Answer

Information flow between components

Question 7

Which organ systems most commonly act as the body's control center in homeostatic regulation?

Accepted Answer

Nervous and endocrine

Question 8

Which of the following is an example of a positive feedback loop in the human body?

Accepted Answer

Childbirth labor contractions

Question 9

If a negative feedback loop controlling blood glucose is interrupted, what is a likely consequence?

Accepted Answer

Uncontrolled increase in blood glucose levels

Question 10

During a fever, which change occurs in the body's temperature regulation feedback loop?

Accepted Answer

The set-point for body temperature is increased

Question 11

Which equation best represents the relationship between the measured variable, set-point, and error signal in a feedback system?

Accepted Answer

$	ext{Error} = 	ext{Set Point} - 	ext{Measured Value}$

Question 12

Which of the following best describes the effector's role in a negative feedback loop?

Accepted Answer

It causes a response that brings the variable back toward the set-point

Question 13

In the context of homeostasis, which of the following is NOT typically controlled by a negative feedback loop?

Accepted Answer

Blood clotting

Question 14

Which statement about positive feedback is correct?

Accepted Answer

It enhances the stimulus, allowing for a large change in a short time

Question 15

Which of the following is a stimulus for the release of glucagon?

Accepted Answer

Low blood glucose

Question 16

Which component of the feedback loop is responsible for sensing/measuring the variable to be controlled?

Accepted Answer

Sensor (Receptor)

Question 17

Which of the following best describes the set-point in a homeostatic system?

Accepted Answer

The desired value that the control center tries to maintain

Question 18

Which of the following is an example of a variable controlled by homeostasis in the human body?

Accepted Answer

Heart rate and blood pressure

Question 19

Which feedback type is described by the following: 'Response is in the same direction as the stimulus'?

Accepted Answer

Positive feedback

Guided Study for ANP: Homeostasis, Membrane Transport, and Epithelial Tissue

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