A thymocyte-derived lymphocyte of immunologic importance that is responsible for cell-mediated immunity. These cells have the characteristic T3 surface marker and may be further divided into subsets according to function, such as helper, suppressor, and cytotoxic. See also: B lymphocyte. Synonym(s): T cell.
2 How long doe flexeril take to be out of system for urine test? 90 hours.: The drug has a half-life of 18 hours, which means it will probably stay active in your body for 90 hours. Therefore, it will show up on drug tests for 3.75 days after you have taken it, but this time period may vary by individual.
In Health. Cotinine is a byproduct of nicotine, which is found in tobacco. How  long cotinine can stay in your urine depends upon the amount of  tobacco you have smoked and how many ye â¦ ars you have been smoking  for. Therefore, cotinine could stay in your urine for as little as  2 days or as much as 3 months.Answered.ow  long cotinine can stay in your urine depends upon the amount of  tobacco you have smoked and how many ye â¦ ars you have been smoking  for. Therefore, cotinine could stay in your urine for as little as  2 days or as much as 3 months. Answered.