Final answer:
Eccrine sweat glands are found all over the body, including the palms and soles, and are responsible for thermoregulation, but the question specifies glands not found in the thick skin of palms and soles, which indicates the answer cannot be eccrine glands.
Step-by-step explanation:
The simple branched alveolar glands referred to in the question are eccrine sweat glands. These glands are found throughout the body and are particularly involved in temperature regulation through the release of sweat. Eccrine glands produce a hypotonic sweat that is mainly composed of water, along with some salts, antibodies, metabolic waste, and dermicidin, which is an antimicrobial peptide. While these glands are abundant all over the body, they are especially numerous on the palms of the hands, the soles of the feet, and the forehead. However, the question mentions that the glands in question are not found in the thick skin of the palms and soles, so the correct answer to this question is not eccrine glands but rather another type of gland not listed in the provided options.