Which of the following is not a function of the csf (cerebrospinal fluid)?

a) reduction of brain weight
b) initiation of some nerve impulses
c) nourishment of the brain
d) midbrain only

The lungs are a. divided into seven lobes b.divided into nine lobes c.separated by the mediastinum d. connected by the mediastinum

True or false. mucous membranes secrete mucus that traps pathogens.

*edit* i took the test and i picked a and it was incorrect for its c! rank the following suggestions for preventing std, in order of increasing effectiveness. 1) using latex condoms properly 2) using spermicidal foam or jelly with a monogamous partner 3) abstaining from sexual intercourse and genital contact a. 1, 2, 3c. 2, 1, 3