Muscarinic acetylcholine receptors are actylcholine receptors.
Tim Severin -LRB- born 25 Sept 1940 -RRB- is a British explorer , historian and writer .. Severin is noted for his work in retracing the legendary journeys of historical figures .. Severin was awarded both the Gold Medal of the Royal Geographical Society and the Livingstone Medal of the Royal Scottish Geographical Society .. Royal Geographical Society. Royal Geographical Society. Royal Scottish Geographical Society. Royal Scottish Geographical Society. He received the Thomas Cook Travel Book Award for his 1982 book The Sindbad Voyage .. Thomas Cook Travel Book Award. Thomas Cook Travel Book Award