Characteristics of Control Systems MCQ Quiz | General Physiology

Welcome to the quiz on the Characteristics of Control Systems in General Physiology, designed for MBBS students. This quiz will test your understanding of the fundamental principles that govern homeostasis and physiological regulation. You will encounter questions on negative and positive feedback, feed-forward mechanisms, the components of a control system (sensors, integrators, effectors), and the concept of gain. A solid grasp of these topics is crucial for understanding both normal physiology and pathophysiology. This quiz consists of 25 multiple-choice questions. After submitting your answers, you’ll see your score and a detailed review of each question. You can also download all questions with their correct answers in a PDF format for future revision.

1. What is the most common type of feedback system in the human body for maintaining homeostasis?

2. Which of the following is a classic example of a positive feedback loop?

3. In a physiological control system, what is the role of the effector?

4. The “gain” of a negative feedback system is mathematically defined as:

5. A high gain in a physiological control system implies:

6. In the regulation of body temperature, what acts as the primary sensor?

7. The integrating or control center in most physiological feedback loops is typically part of the:

8. The salivation response that occurs when seeing or smelling food is an example of which type of control?

9. The term ‘homeostasis’ refers to the body’s ability to:

10. The formation of a blood clot to stop bleeding involves a cascade of enzyme activations, which is an example of:

11. In a control system, the ‘set point’ refers to the:

12. A failure of homeostatic control systems in the body typically leads to:

13. In the baroreceptor reflex for blood pressure control, the baroreceptors in the carotid sinus and aortic arch function as the:

14. What is the difference between the set point and the actual value of a physiological variable called?

15. Extremely high gain in a negative feedback system can potentially lead to:

16. The pathway that carries information from the sensor to the control center is known as the:

17. In the control of blood glucose, the pancreas (islets of Langerhans) acts as:

18. The mid-cycle LH surge in the female menstrual cycle, where rising estrogen levels stimulate more LH release, is an example of:

19. A key difference between open-loop and closed-loop (feedback) control systems is that open-loop systems:

20. An anticipatory increase in heart rate before exercise begins is a manifestation of:

21. A control system with a finite gain will always result in:

22. The rapid influx of Na+ ions that causes depolarization during an action potential, which in turn opens more voltage-gated Na+ channels, is a form of:

23. In a negative feedback loop, the response of the effector:

24. All positive feedback loops in the body must have:

25. Shivering in response to cold is an example of an effector action. What is the primary purpose of this action?