Jin stepped on a nail and cut his foot. A signal was sent to his brain. In response, the blood on his foot started to clot. In this example of a control mechanism, what is the effector?

An effector is the part of the body that carries out the response to a signal. Here, the response is that blood at Jin’s foot begins to clot, so the effector is Jin’s blood starting to clot. Stepping on the nail and cutting his foot are the trigger and injury, not the response.

AI-written and checked against the verified answer.