What type of glands are found on the palmar surfaces of the hands and plantar surfaces of the feet?

The correct answer is based on the specific type of glands located in the skin of the hands and feet. Eccrine or sweat glands are the primary glands responsible for the production and secretion of sweat, which helps regulate body temperature and maintain skin hydration. These glands are distributed widely across the skin but are particularly abundant on the palmar and plantar surfaces.

Eccrine glands are classified as a type of exocrine gland, meaning they release their product through ducts onto the skin surface. They play a crucial role in thermoregulation as well as the excretion of certain waste products. In contrast to other types of glands, such as sebaceous glands, which secrete an oily substance, or follicular glands associated with hair follicles, eccrine glands are specifically designed for sweat production.

Understanding the function and location of eccrine glands clarifies their importance on the hands and feet, where their activity helps in grip and preventing overheating during physical activity.