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Which of the following structures is LEAST involved in thermoregulation?HairSweat glandsSebaceous glandsCapillaries

Question

Which of the following structures is LEAST involved in thermoregulation?

  • Hair
  • Sweat glands
  • Sebaceous glands
  • Capillaries
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Solution

Sebaceous glands are the least involved in thermoregulation. Here's why:

  1. Hair: Hair provides insulation, which helps to retain heat. It also protects the skin from sun exposure, which can help to regulate body temperature.

  2. Sweat glands: These are crucial for thermoregulation. When your body temperature rises, your sweat glands produce sweat, which cools your body as it evaporates.

  3. Sebaceous glands: These glands produce sebum, an oily substance that helps to moisturize the skin and hair. While sebum does provide a small amount of insulation, sebaceous glands are not primarily involved in thermoregulation.

  4. Capillaries: These small blood vessels play a key role in thermoregulation. When you're hot, the capillaries expand to allow more blood to flow near the surface of your skin, where it can be cooled. When you're cold, the capillaries constrict to keep warm blood away from the skin's surface and reduce heat loss.

So, out of these four options, sebaceous glands are the least involved in thermoregulation.

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