What does this symbol ∞ means in mathematics?

The mental health technician was asked by the psychiatric nurse to monitor a biplor patient she took a phone call from the psychiatric. the patient began running down the hall and attempted to climb up to the window stating that she has magical powers and must get out to save her people. the mental health technician knows that this behavior can be recognized as

1. controls how much sugar is in the blood pancreas 2. controls the other glands pituitary gland 3. manufactured by the brain to relieve pain thyroid 4. gland that regulates the body's energy levels endorphins

Answer in a couple of paragraphs, 1 or 2 at the most if anything! 20 points + brainliest--> explain what all the systems in your body do to work together < --list of systems needed: circulatory systemrespiratory systemdigestive systemexcretory systemnervous system