(ii) The area commander concerned for Ready Reservists assigned to troop program units under their control. (See AR 140-1, para 1-6.) (iii)... The organization is heavily reliant on mobilized Troop Program Units (TPU) Reserves and Special Skills Trainers (SST) to complete our mission.
Noun. 1. striation-any of a number of tiny parallel grooves such as: the scratches left by a glacier on rocks or the streaks or ridges in muscle tissue. stria. groove, channel-a long narrow furrow cut either by a natural process (such as erosion) or by a tool (as e.g. a groove in a phonograph record).
Best Answer: The appearance of striations in skeletal muscle is caused by the arrangement of the contractile units called sarcomeres that make up the myofibrils inside muscle cells. They are arranged in parallel rows and when all the end (Z-lines) line up next to each other, it creates the striations. Source(s):