When a signal needs to be sent to most cells throughout a multicellular organism, the signal most suited for this is a

Question

Quizplus · Accepted Answer

Hormones are signaling molecules that can travel long distances through the bloodstream and can affect many cells in different parts of the body. This makes them well-suited for sending signals to many cells throughout a multicellular organism. Neurotransmitters, on the other hand, are typically used for sending signals within a specific region or pathway of the nervous system. Dissolved gases, such as nitric oxide, can also act as signaling molecules but are usually used for more localized signaling. Scaffold is not a type of signal.

When a Signal Needs to Be Sent to Most Cells