Which of the following organ systems is NOT involved in thermoregulation?

• A. Nervous system
• B. Integumentary system
• C. Digestive system
• D. Muscular system

Answer: (C)

Verified step by step guidance

1. Understand the concept of thermoregulation: Thermoregulation is the process by which organisms maintain their internal body temperature within a certain range, despite external temperature changes. It involves various organ systems working together to regulate heat production, heat loss, and heat conservation.
2. Analyze the role of the nervous system: The nervous system plays a key role in thermoregulation by detecting temperature changes through sensory receptors and sending signals to effectors (e.g., sweat glands, muscles) to initiate appropriate responses like sweating or shivering.
3. Examine the integumentary system: The integumentary system, which includes the skin, hair, and sweat glands, is directly involved in thermoregulation. For example, sweat glands help cool the body through evaporation, and blood vessels in the skin can dilate or constrict to regulate heat loss.
4. Consider the muscular system: The muscular system contributes to thermoregulation through processes like shivering, which generates heat by rapid muscle contractions when the body is cold.
5. Evaluate the digestive system: The digestive system is primarily responsible for nutrient absorption and energy production, but it is not directly involved in thermoregulation. This makes it the correct answer to the question.