Which of the following statements about apocrine sweat glands is true?

• A. They secrete a watery, odorless fluid directly onto the skin surface.
• B. They are primarily found in the axillary and genital regions.
• C. They play a major role in thermoregulation.
• D. They are most active during childhood.

Answer: (B)

Verified step by step guidance

1. Understand the function and location of apocrine sweat glands: Apocrine sweat glands are specialized sweat glands that are primarily found in the axillary (armpit) and genital regions. They differ from eccrine sweat glands, which are distributed widely across the body and play a major role in thermoregulation.
2. Recognize the type of secretion produced by apocrine sweat glands: Apocrine glands secrete a thicker, milky fluid that contains lipids and proteins. This secretion is odorless when released but can develop an odor when broken down by bacteria on the skin.
3. Identify the activation period of apocrine sweat glands: Apocrine sweat glands become active during puberty, not childhood, and their activity is often linked to hormonal changes.
4. Clarify the role of apocrine sweat glands in thermoregulation: Unlike eccrine sweat glands, apocrine sweat glands do not play a significant role in thermoregulation. Their function is more related to emotional sweating and pheromone release.
5. Evaluate the correct statement based on the above information: The statement 'They are primarily found in the axillary and genital regions' is true, as it accurately describes the location of apocrine sweat glands.