A chemoreceptor, or chemosensor, is a sensory receptor that translates a chemical signal into an action potential. Chemoreception is the three-stage process by which chemoreceptors function. The levels of chemoreception are detection, amplification and signaling. Chemoreceptors only bind to a certain kind of molecule.
With the Presidential Inauguration now over in America, I thought I would go back into my collection and see if I had any old film from an earlier inauguration. I found one! On March 4, 1925, Calvin Coolidge was inaugurated the 30th President of the United States. He was sworn in by Chief Justice William H. Taft on the East Portico of the U.S. Capitol. Coolidge was already President after the death of President Harding in 1923 and this was to become his only elected term. From this old silent newsreel, you'll see Coolidge along with his wife and Senator Curtis leaving by automobile.
Calvin and Grace had two children, John and Calvin, Jr. Calvin Coolidge worked as a lawyer. He was also interested in politics and won many elections. In 1918, Coolidge was elected the governor of Massachusetts. Two years later, he was elected vice president of the United States. After President Harding died, Coolidge became president. He won the election in 1924 and was president until 1929. Calvin Coolidge died in 1933.