1. (Pharmacology) a drug, agent, or nerve that can cause dilatation (vasodilatation) of the walls of blood vessels. 2. (Physiology) a drug, agent, or nerve that can cause dilatation (vasodilatation) of the walls of blood vessels.
As part of their proposal to âreintroduceâ 750 Mexican wolves, these scientists want to have a self-sustaining population of 250 wolves in southern Utah and northern Arizona â places that fall well outside the predatorsâ historic range.
By the mid-1930s, most gray wolves in the United States had been killed. Today, the gray wolf's North American range has been reduced to Canada and parts of Alaska, Idaho, Michigan, Minnesota, Montana, Oregon, Utah, Washington, Wisconsin and Wyoming.Mexican wolves, a gray wolf subspecies, are found in New Mexico and Arizona.y the mid-1930s, most gray wolves in the United States had been killed. Today, the gray wolf's North American range has been reduced to Canada and parts of Alaska, Idaho, Michigan, Minnesota, Montana, Oregon, Utah, Washington, Wisconsin and Wyoming.