The person who carries a message is often referred to as a "messenger." This term can apply to various contexts, including someone delivering news, information, or a communication from one party to another. In literature and mythology, messengers can also symbolize the transfer of important information or themes between characters or realms.
a sender
the medium soon become part of the message
mRNA
The channel.
Messenger RNA (mRNA)
nerve impulses
Messenger RNA.
Carries the DNA message from the nucleus to the ribosome.
afferent
Yes?
The answer to this one is GENE 8)
nerve impulses