There are two kinds of neurotransmitters â INHIBITORY and EXCITATORY. Excitatory neurotransmitters are not necessarily exciting â they are what stimulate the brain. Those that calm the brain and help create balance are called inhibitory.here are two kinds of neurotransmitters â INHIBITORY and EXCITATORY. Excitatory neurotransmitters are not necessarily exciting â they are what stimulate the brain. Those that calm the brain and help create balance are called inhibitory.
The largest desert in the world is the interior of Antarctica. This has an area of about 14,000,000 km2 (5,400,000 sq mi). Rainfall in the Antarctic interior is extremely low, down to 20 millimeters (0.8 in) per year. This is partially because it is so cold that all liquid water quickly freezes solid and joins the ice pack.
That said, let us have a look at the 10 largest African deserts. See Also: 10 Greatest Landmarks on Map of Africa. 1. The Sahara Desert dailymail.co.uk. This is probably the most popular dessert in the whole world. It is not only the largest Africa desert but also the largest desert in the world occupying 3.3 million sq. miles and still growing larger. It extends over 25% of the continent and occupies many countries including chad, Algeria, Sudan, Niger, Morocco, Mali, Libya, Egypt, Mauritania and Tunisia.