The contraction produced can be described as a twitch, summation, or tetanus, depending on the frequency of action potentials. In skeletal muscles, muscle tension is at its greatest when the muscle is stretched to an intermediate length as described by the length-tension relationship. Smooth and cardiac muscle contractions are myogenic and can be modulated by the autonomic nervous system.
Citation: Pray, L. (2008) Sex-linked diseases: the case of Duchenne muscular dystrophy (DMD). Nature Education 1(1):132. Prenatal diagnostic testing can now determine whether a fetus carries a debilitating or fatal sex-linked mutation.
en espaÃ±olAcerca de las enfermedades de transmisiÃ³n sexual (ETS) Sexually transmitted diseases (STDs) are infectious diseases that spread from person to person through intimate contact. STDs can affect guys and girls of all ages and backgrounds who are having sex â it doesn't matter if they're rich or poor.