A castaway on a deserted 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 bottle is analogous to a(n)
A) nerve cell.
B) artery.
C) carrier molecule.
D) hormone.
E) receptor.

Question

Quizplus · Accepted Answer

In endocrine signaling, the "bottle" that carries the message (in this case, the hormone) through the bloodstream to distant target cells is analogous to a carrier molecule. Carrier molecules transport hormones, which are water-insoluble, through the bloodstream to their target sites.

A Castaway on a Deserted Island Puts a Message in a Bottle