The _____ is the bacterial structure that acts as a selective barrier, allowing nutrients to enter the cell and wastes to leave the cell. plasma membrane. nucleoid region. ribosome. pili. cell wall. The structure that regulates the passage of material into and out of this bacterial cell is indicated by the letter _____.
Despite the body of knowledge around it, there was a major uptick in syphilis cases during the 2000s, especially among women ages 20 to 24 and men ages 35 to 39 (CDC). If syphilis goes untreated, the affected person is at risk of developing neurosyphilis.
The purpose of this study was to observe the natural progression of untreated syphilis in rural African-American men in Alabama under the guise of receiving free health care from the United States government.