Question 1: What is the primary purpose of homeostasis in living organisms?

Answer: Maintain a stable internal environment

Question 2: Match the following terms to their definitions:

Answer: See full answer key

Question 3: Fill in the blank: Homeostasis involves maintaining a stable ______ environment.

Answer: internal

Question 4: True or False: Homeostasis only occurs in mammals.

Answer: False

Question 5: True or False: The process of sweating helps in thermoregulation.

Answer: True

Question 6: Explain how the body regulates blood glucose levels.

Answer: The pancreas releases insulin to lower blood glucose and glucagon to increase it.

Question 7: Describe the role of the kidneys in osmoregulation.

Answer: The kidneys filter blood to regulate water and electrolyte balance, excreting excess salts and water as urine.

Question 8: What is the effect of vasodilation on body temperature?

Answer: Vasodilation increases blood flow to the skin, helping to dissipate heat and lower body temperature.

Question 9: Calculate the change in body temperature if a person loses 500 calories through sweating. Assume 1 calorie reduces body temperature by 0.001°C.

Answer: 0.5°C decrease

Question 10: Order the steps of the negative feedback loop in thermoregulation after an increase in body temperature:

Answer: See full answer key

Question 11: Discuss the importance of homeostasis in maintaining health and preventing disease. Provide examples.

Answer: Homeostasis is vital for maintaining health as it ensures that internal conditions remain stable, allowing cells to function optimally. For example, thermoregulation prevents overheating, while blood glucose regulation prevents diabetes. Disruption to homeostasis can lead to conditions such as hypothermia or hyperglycemia.