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 chromosome is a single DNA strand. On the image you can actually see 2 chromosomes, which means 2 strands. They may be (almost) exact copies if they are the result of a duplication during mitosis or meiosis, or they may be different homologous chromosomes joined together during meisosis; itâs hard tot ell without further context.