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6. Endocrine glands ________. a. secrete hormones that travel through a duct to the target organs b. release neurotransmitters into the synaptic cleft c. secrete chemical messengers that travel in the bloodstream d. include sebaceous glands and sweat glands

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Histrionicus

Answer:

The correct answer is option C. secrete chemical messengers that travel in the bloodstream.

Explanation:

Endocrine glands are organ or gland that secrets hormones that are chemical messengers travel through the bloodstream instead of the duct. There are several glands that are part of the endocrine system such as the thyroid gland, pancreas, hypothalamus, and others.

These chemical agents are the travel through the blood and act on the site of action.

Thus, the correct answer is option C. secrete chemical messengers that travel in the bloodstream.

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