The cardiovascular system is responsible for which of the following?

A. Playing an important role in the immune system and fighting off invading microbes, infections, and toxins

B. Maintaining proper blood volume, ion and salt concentrations in the body

C. Transporting homeostasis-regulating hormones, nutrients, and oxygen

D. Secreting hormones into the bloodstream

What behavior of an expectant mother is unhealthy for the fetus

Drea has never had alcohol, but she believes her friends when they tell her that almost everybody at their school drinks on a regular basis. in reality, very few students at the school drink alcohol. which statement best describes what is occurring in this situation? a. peers are influencing what drea thinks of as normal behavior. b. peers are pressuring drea to drink. c. drea is not really influenced by what her peers think. d. drea is giving in to peer pressure.

9. withdrawal occurs when alcohol is removed from the system after the brain a. adapted to the continued presence of alcohol b. become physically saturated with alcohol c. become impervious to the effects of alcohol d. begun to treat alcohol as a poison