Question

secrete into multiple choice goblet cells; mucus; the blood endocrine glands; hormones; ducts exocrine glands; hormones; ducts endocrine glands; hormones; the blood exocrine glands; mucus; the blood

Explanation:

Endocrine glands are known for secreting hormones directly into the bloodstream. Exocrine glands secrete substances like mucus into ducts. Goblet cells secrete mucus but not into the blood. Hormones are secreted by endocrine glands, not exocrine glands into ducts.

Answer:

D. Endocrine glands; hormones; the blood