Multiple choice Which of the following group of glands release their secretions through ducts? Thyroid gland adrenal gland and hypothalamus. Sweat glands, oil glands and thyroid glands. Sweat glands, Thyroid glands and salivary glands. Sweat glands, oil glands and salivary glands. Thyroid gland, oil glands and salivary glands. Reveal answer Fill a bubble to check yourself D Correct answer Explanation Sweat glands, oil glands and salivary glands are ducted glands.