Multiple Choice
On a cold day, blood vessels in the skin __________.
38. Animal Form and Function
Thermoregulation
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The wolf, his coat glowing in the early spring sunshine, sat atop a cold boulder after unsuccessfully pursuing a plump jackrabbit. He continued to pant while __________.
A
his body heat evaporated into the rock
B
heat escaped his open mouth by conduction
C
receiving heat by conduction from the sun
D
heat evaporated away on the gentle breeze
E
heat radiated from his tired body
Verified step by step guidance1
Identify the process of heat transfer that is occurring in the scenario. The wolf is losing heat to the environment, which is a common biological process.
Understand the different modes of heat transfer: conduction, convection, evaporation, and radiation. Conduction involves direct contact, convection involves fluid movement, evaporation involves phase change, and radiation involves electromagnetic waves.
Analyze the scenario: the wolf is sitting on a boulder, panting, and exposed to the sun. Consider how each mode of heat transfer could apply.
Evaluate the options: 'his body heat evaporated into the rock' suggests conduction, 'heat escaped his open mouth by conduction' is incorrect as conduction requires direct contact, 'receiving heat by conduction from the sun' is incorrect as the sun transfers heat by radiation, and 'heat evaporated away on the gentle breeze' suggests evaporation.
Conclude that the most appropriate mode of heat transfer for the wolf losing heat in this scenario is radiation, as it involves the emission of heat from the wolf's body into the surrounding environment without direct contact.
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