MCAT Question of the Day
    •

    Q:

    		 Prostaglandins are paracrine messengers, which means their target sites are:
    		 

    A

    		 far from their secretion sites.

    B

    		 in close proximity to their secretion sites.

    C

    		 the same as the cells that secrete them.

    D

    		 only accessible through the bloodstream.



    Endocrine System |
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