1 Isotonic -a muscle fiber contraction in which force production is unchanged when the muscle contracts causing movement of an external load.  Isokinetic -a muscle fiber contraction in which force production of the contraction is sufficient to overcome the external load.
HIV/AIDS. HIV Risk Behaviors. The risk of getting HIV varies widely depending on the type of exposure or behavior (such as sharing needles or having sex without a condom). Some exposures to HIV carry a much higher risk of transmission than other exposures.
Am still a bit confused-Syphilis Question (ORAL SEX AND STDs, 2010). ...that of anal or vaginal sex, numerous studies have demonstrated that oral sex can result in the transmission of HIV and other sexually transmitted diseases (STDs) .Abstaining from oral, anal, and vaginal sex altogether or having sex only with a...Read more Â»...that of anal or vaginal sex, numerous studies have demonstrated that oral sex can result in the transmission of HIV and other sexually transmitted diseases (STDs) . Abstaining from oral, anal, and vaginal sex altogether or having sex only with a... Read more Â».