1. What is the primary role of homeostasis in the human body? A. To regulate body temperature B. To maintain psychological stress C. To ensure proper hormone production D. To control muscle contraction Answer: A. The primary role of homeostasis is to regulate body temperature. This is essential for maintaining a stable internal environment, which is necessary for the optimal functioning of cells and organs. 2. Which part of the brain is primarily responsible for the regulation of homeostasis? A. Cerebellum B. Medulla oblongata C. Hypothalamus D. Frontal lobe Answer: C. The hypothalamus is primarily responsible for the regulation of homeostasis. It acts as the body's thermostat, controlling factors such as temperature, hunger, thirst, and circadian rhythms. 3. How does the negative feedback mechanism contribute to homeostasis? A. By amplifying the effects of a stimulus B. By reducing the impact of a stimulus C. By preventing the stimulus from occurring D. By neutralizing the stimulus without any adjustments Answer: B. The negative feedback mechanism contributes to homeostasis by reducing the impact of a stimulus. This process helps to return the body to its set point after any form of disturbance. 4. In the context of homeostasis, what is the significance of the set point? A. It represents the maximum level of a variable that the body can tolerate. B. It is the target value for a physiological measure that the body aims to maintain. C. It is the lowest possible value for a variable within the homeostatic range. D. It signifies the threshold for triggering an adaptive response. Answer: B. The set point in homeostasis is the target value for a