Worksheet Chapter 3: Coordination and Response

1. Explain two crucial functions of transpiration in plants.

2. Compare how a dog and a reptile (lizard) adjust their bodies or behaviors to lower their body temperature in high ambient heat.

3. A student spends 3 hours in an air-conditioned room set to 16°C wearing thin clothes. List three physiological changes that occur in the student's body to prevent hypothermia.

4. Which action is taken by guard cells in plant leaves during a hot, dry afternoon to prevent dehydration?

5. Explain why maintaining a stable internal body temperature around 37°C is essential for human enzyme function.

6. Fill in the blank: The maintenance of a stable internal environment within an organism is known as ________.

7. Explain how kidneys regulate body water balance after a person completes a strenuous marathon and sweats heavily.

8. True or False: Shivering generates heat through rapid, involuntary contractions of skeletal muscles.

9. Describe two corrective mechanisms that occur in human skin when exposed to a very hot environment.

10. True or False: When body temperature decreases, skin blood vessels dilate to release excess heat.