Q: What type of glands secrete hormones?  

Answer: A

Endocrine glands are the type of glands that secrete hormones into the bloodstream or surrounding tissues. These hormones regulate various physiological functions in the body, such as metabolism, growth and development, and reproduction. Exocrine glands, on the other hand, secrete their products through ducts into a body cavity or onto a body surface. Heterocrine glands produce both exocrine and endocrine secretions, while partially endocrine glands have both endocrine and non-endocrine functions. Therefore, the correct answer is option A, endocrine glands, as they are solely responsible for secreting hormones.

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