______________ is the scientific field that explores connections among psychological factors, the nervous system, and the immune system

The toxin produced by the micro-organism that causes botulism prevents the release of ______

a. acetylcholine c. serotonin b. dopamine d. endorphins

Anita is experiencing a burning sensation in the vaginal opening as the top of the baby's head is just starting to show, so she is in the ______________ stage of the birth process

a. first b. second c. third d. fourth