Question

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?

Jin stepping on a nail.
Jin cutting his foot.
Jin’s body signaling the brain.
Jin’s blood starting to clot.

Answer 1

Blood clotting

Answer 2

The effector is the blood starting to clot. This is because it is binding together with a protein in response to a signal.