Beta blockers. Beta blockers, also called beta-adrenergic blocking agents, treat a variety of conditions, such as high blood pressure and migraines. Find out more about this class of medication. Beta blockers, also known as beta-adrenergic blocking agents, are medications that reduce your blood pressure. Beta blockers work by blocking the effects of the hormone epinephrine, also known as adrenaline. When you take beta blockers, your heart beats more slowly and with less force, thereby reducing blood pressure.
The Vikings came from three countries of Scandinavia: Denmark, Norway and Sweden. The name 'Viking' comes from a language called 'Old Norse' and means 'a pirate raid'. People who went off raiding in ships were said to be 'going Viking'.
The Vikings who stayed in France became known as the Normans (Northmen). The first great Norman leader was Rollo the Ganger. After a fierce battle in 911 between the French and the Normans, a peace-settlement was agreed.he Normans. The people of Scandinavia (Norway, Denmark and Sweden) found it difficult to produce enough food their needs. In the 8th century Scandinavians, who became known as Vikings or Northmen, began to send out raiding parties in search of food and plunder.