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A castaway on a desert island puts a message in a bottle and throws it into the ocean,hoping it will wash up on some inhabited shore and bring help.
-In endocrine signaling,the castaway is analogous to a(n)
A) nerve cell.
B) artery.
C) carrier protein.
D) the blood
E) gland.

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The castaway on the desert island represents a gland in endocrine signaling, because the gland secretes hormones into the bloodstream, much like the castaway places a message in a bottle and sends it out to sea. The hope is that the hormone will eventually reach a target organ or tissue and elicit a response.

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