When the temperature of the outside air exceeds their internal body temperature, jackrabbits living in hot, arid lands will

constrict the blood vessels in their large ears to reduce transfer of external heat to the blood in their ears.

Evolutionary adaptations that help diverse animals directly exchange matter between cells and the environment include

an external respiratory surface, a small body size, and a two-cell-layered body

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Chapter 40

Basic Principles of Animal Function

Question	Answer
When the temperature of the outside air exceeds their internal body temperature, jackrabbits living in hot, arid lands will	constrict the blood vessels in their large ears to reduce transfer of external heat to the blood in their ears.
What type of epithelium would you expect to find covering a surface subject to physical forces?	stratified epithelium
Evolutionary adaptations that help diverse animals directly exchange matter between cells and the environment include	an external respiratory surface, a small body size, and a two-cell-layered body