Organisms Maintain Dynamic Homeostasis Through Behavioural and Physiological Mechanisms

question 64

Multiple Choice

Organisms maintain dynamic homeostasis through behavioural and physiological mechanisms. Which of the following statements is an accurate explanation of a negative feedback mechanism used by animals to regulate body temperature?

• A) Possums are able to cool themselves during warmer months by producing more brown fat, which contains abundant mitochondria and a rich blood supply.
• B) Desert jackrabbits have unusually large ears that serve as solar heat collectors to enable them to maintain their body temperatures.
• C) A ground squirrel's hypothalamus detects changes in environmental temperatures and responds by activating or suppressing metabolic heat production.
• D) A goldfish slows its movements when the water temperature is lower.

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