Drugs that break down a psychological barrier against doing other drugs are known as
a. introductory drugs
b. gateway drugs
c. first user drugs

Synovial fluid serves as a lubricant to prevent friction between two parts that move on each other such as in the case of and bones.

Which statement best describes the role of religion and culture in ancient medicine? religion and culture did not influence the types or treatments used; however, they did play a role in who was allowed to practice medicine. religious beliefs guided physicians to perform certain procedures; however, culture did not play a role in the way physicians worked or who could become a physician or a healer. religious beliefs often guided the diagnosis and treatment of disease; the culture often determined who could practice medicine and what procedures were appropriate. culture was the primary factor that determined who could be a physician and what types of diagnosis and treatment were used; religion was not important during this time period.

Which is a contraceptive method that is classified as hormonal birth control?