Which of the following is part of the peripheral nervous system?

Gregory was caught smoking marijuana on his school’s campus during lunch. this is not the first time gregory has violated the school’s drug-free policy. his principal has decided to expel him, and he may face fines and time in a juvenile detention facility. gregory faced consequences when he was sent to juvenile detention after repeatedly violating the school’s drug-free policy.

Energy needs, in total kilocalories per day, are greater during than any other time of life. a.childhood b.infancy c.adulthood d.adolescence

Why would one lymph node in the neck be swollen and not the other? what causes them to swell?