Next week will also see the release of a celebrity fundraising single for victims of Aids in Africa, and for victims of the terror attacks of 11 September in New York.

BBC: Stars release Damilola tribute single

Though the receptors got their name through their association with nicotine, their primary function in the brain is to regulate the release of a variety of neurotransmitters, including acetylcholine, which aids learning and memory.

FORBES: The Nicotine Cure