Two of these cells produce the hormones insulin and glucagon. The beta cells create and secrete insulin. The alpha cells create and secrete glucagon. These two hormones are responsible for maintaining the glucose level in blood at a constant rate so that all the cells have the required energy to perform their functions.
strand1 (strand),USA pronunciation v.t. 1  to drive or leave (a ship, fish, etc.) aground or ashore:The receding tide stranded the whale. ( 2 usually used in the passive) to bring into or leave in a helpless position:He was stranded in the middle of nowhere.
A DNA strand is simply a string of nucleotides joined together. I can show how this happens perfectly well by going back to a simpler diagram and not worrying about the structure of the bases. The phosphate group on one nucleotide links to the 3' carbon atom on the sugar of another one.