Endocrine glands ________.
A. Do not have ducts to carry their product to a surface
B. Do not have ducts to retain their product below surface
C. Have ducts that carry their secretory product to a surface
D. Have ducts to retain their secretory product below surface
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The correct answer is A. Endocrine glands do not have ducts to carry their product to a surface.
To determine the correct answer, we need to understand what endocrine glands are and how they function.
Endocrine glands are a type of gland in the body that secrete hormones directly into the bloodstream. These hormones are then carried to specific target cells or organs in the body, where they regulate various physiological processes.
The distinguishing feature of endocrine glands is that they do not have ducts. Ducts are structures that carry secretions from glands to a particular surface, such as the skin or a body cavity.
In contrast, endocrine glands release their hormones directly into the bloodstream. The hormones then travel through the circulatory system to their target cells or organs. This allows for a more widespread and systemic effect, as the hormones can reach any part of the body that is supplied by blood.
So, option A is the correct answer as endocrine glands do not have ducts to carry their product to a surface.