What is the difference between an exocrine gland and an endocrine gland?

Q. What is the difference between an exocrine gland and an endocrine gland?

A.            An endocrine gland secretes neurotransmitters (an exocrine gland does not).

B.            An endocrine gland secretes via a tube to the destination (an exocrine gland does not).

C.            An exocrine gland secretes into the blood (an endocrine gland does not).

D.            An endocrine gland secretes into the blood (an exocrine gland does not).

Answer: An endocrine gland secretes into the blood (an exocrine gland does not).