b0416
- 1. Biology Item 04-16 Warm- blooded vertebrates or the homeothermics could withstand changes of temperature better than cold-blooded ones or the poikilothermics because: A. the body temperature of warm-blooded animals fluctuate with their environment B. warm-blooded animals could maintain body temperature that is constant C. poikilothermics have a stable body temperature D. poikilothermics have body temperature that goes up and down with the changes of the temperature of their environment www.upcatreview.com
- 2. Biology Item 04-16 There is a group of animals that have homeostatic mechanisms for maintaining the temperature of the internal environment within very narrow limits. www.upcatreview.com
- 3. Biology Item 04-16 They can do this even though there may be large changes in the environmental temperature. Such animals, humans, other mammals and birds, are called homeotherm s. www.upcatreview.com
- 4. Biology Item 04-16 Regardless of environmental temperature, the metabolism of homeothermics maintains their internal temperature at a constant value. www.upcatreview.com
- 5. Biology Item 04-16 Humans can therefore function quite efficiently in both cold and hot environments. www.upcatreview.com
- 6. Biology Item 04-16 Another group of organisms known as poikilotherms have not developed mechanisms for regulating the temperature of their internal environment. www.upcatreview.com
- 7. Biology Item 04-16 Their internal temperature therefore changes with temperature changes in the external environment. Lizards and snakes are examples of poikilotherms. www.upcatreview.com