Botulinum toxin is a blocking agent preventing the release of certain neurotransmitters, specifically Acetylcholine, from the endings of the motor nerves (#Kennedy, 2002 and (#Kent, 1998). Botulinum toxin has a light chain and a heavy chain, each of which contributes to the toxicity.
Making the world better, one answer at a time. The geography of Greece is very mountainous with many valleys around them making it hard for other city states to come and attack them. The geography of Greece is very mountainous with many valleys around them making it hard for other city states to come and attack them.
Greece is made up of a mountainous mainland and hundreds of islands where each one offers its own share of stunning landscapes, historic sites, nightlife scenes and cultural delights. An overview of the best places to visit in Greece :