If Savanah has been diagnosed with panic attacks and her doctors are using this machine which will beep once her heart rate speeds up in order for her to be able to lower and control it better, this means that they are most likely using a biofeedback machine. These type of machines work exactly like mentioned in the question and have been used for things like these.
Answer:
It is the maximum amount of pain that one person can tolerate without dying.
Joints is the correct answer for this question
