Which of the following is a function of lymphocytes?
a. secrete cytokines
b. secrete antibodies
c. kill cancer cells
d. kill bacteria and viruses
e. all of the above

e. all of the above

Explanation:

Lymphocytes form part of the immune system and upon offence/infection they release cytokines and other factors that kill or neutralize foreign/threatening organisms in the body.

answer: no, they are not.*

although rubber bands that contain excessive amounts of dye, toxins, or additives are sometimes toxic, most rubber bands do not cause any health issues. since they are typically made of latex, (a natural substance that is extracted from trees) they are not dangerous in any way if you chew them or accidentally ingest a piece of rubber band. however, chewing rubber bands does pose a choking hazard and is not a good habit to have.

*depending on the type of rubber band. the typical rubber bands that you see at stores are not toxic, but other types of rubber or latex that contains certain chemicals may be unhealthy and hazardous.