Definition of in session. 1  1 : in the process of meeting formally Congress is in session right now. 2  2 US : conducting classes School will be back in session at the beginning of September.
Mylar Pieces. Circles & Hexagons. Multiple Sizes. Hexagon & Circle Mylar Pieces are heat resistant and made especially for quilters who desire to make perfectly shaped circles and hexagons each time with hand or machine piecing and appliquÃ©. Cut fabric 1/4 larger than Mylar template.
The myelin sheath acts as an insulating layer to prevent that electrical impulses from dissipating into the surrounding tissue. There are neurons without this insulating layer, and impulses travel at approx. 5m/sec. With a myelin sheath, impulses can travel upto 100 m/sec.