[Campbell Biology P.925] A mammal is exposed to a prolonged period of high external temperat... | Practice Question

A mammal is exposed to a prolonged period of high external temperature and low humidity. Which two organ systems, based on their main functions described in the text and Table 40.1, would be most crucial for its survival by preventing dehydration and regulating body temperature?

  • A: Circulatory and Nervous Systems
  • B: Respiratory and Digestive Systems
  • C: Integumentary and Excretory Systems
  • D: Skeletal and Muscular Systems

Explanation

The text explicitly states that the Integumentary System 'protects against mechanical injury, infection, dehydration; thermoregulation.' This directly addresses both concerns. Table 40.1 lists the Excretory System's main functions as 'Disposal of metabolic wastes; regulation of osmotic balance of blood,' which is crucial for maintaining internal water balance and preventing dehydration, especially in arid conditions. Both systems are vital for survival under such stress.