Endotherms And Ectotherms
Listen to part of a lecture in a biology class.
- What do the speakers mainly discuss?
- A. Internal processes that help animals maintain constant metabolic rates.
- B. Differences in how animals regulate their body temperatures.
- C. Behaviors that help some animal species survive in extreme environments.
- D. The difficulty of determining whether an animal is an endotherm or an ectotherm.
- According to the professor, what is distinctive about brown fat?
- A. It produces large amounts of triglyceride.
- B. It provides fuel for muscle movement.
- C. It produces heat without muscle movement.
- D. It insulates internal organs from the cold.
- Why does the professor mention elephants?
- A. To contrast them with small animals that live in extremely cold environments.
- B. To show an important behavioral difference between two mammal species.
- C. To emphasize that body size helps determine an animal’s metabolic rate.
- D. To indicate that endotherms may use behavior to help regulate body temperature.
- What does the professor emphasize about the metabolic rate of ectotherms?
- A. It is regulated by taking short, quick breaths.
- B. It varies throughout the day.
- C. It is much slower than the metabolic rate of endotherms.
- D. It increases to help the animals survive a sudden drop in temperature.
- What happens to an ectotherm in a temperature chamber?
- A. It regulates its temperature by behaving in certain ways.
- B. It shivers when the chamber’s temperature is lowered.
- C. Its metabolism remains unchanged.
- D. Its body temperature matches the temperature inside the chamber.
- Why does the professor says this: 🎧
- A. To indicate that the student’s assertion is correct.
- B. To introduce a fact she thinks will surprise the student.
- C. To point out the effectiveness of the frog’s defense mechanisms.
- D. To find out what the student knows about extreme environments.
B C D C D A