Temperature Regulation in Hot Environments

1. Temperature Regulation in Hot Environments Options Maintain a constant body temperature Allow body temperature to increase, animal becomes hyperthermic, uses controlled hyperthermia

2. Maintain a Constant Body Temperature Maintenance of body temperature at a constant level requires �evaporative cooling�. Sweating Panting Saliva Spreading

3. Sweating Evaporation of water from surface of skin to cool body Electrolytes are also a component of sweat Get loss of water and salt from the body

4. Sweating

5. Panting Rapid, shallow breathing that evaporates water from the upper respiratory tract Used by many carnivores and ungulates Panting animals do not lose electrolytes and so do not become sodium stressed Respiratory alkalosis should not develop in animals adapted for panting

6. Panting

7. Panting (Continued)

8. Panting (Continued)

9. Controlled Hyperthermia Found in many mammals Examples include the camel, antelope ground squirrel, African plains antelope The amount that body temperature is increased is in some cases dependent upon season and the water status of the animal

10. Camel

11. Camel (Continued)

12. Antelope Ground Squirrel

13. Keeping One�s Brain Cool