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.
Kalahari Desert. 1. Sahara Desert. The Sahara Desert is the world's largest hot desert; it stretches over 3,500,000 square miles in Northern Africa. The Great Victoria Desert stretches across 163,900 square miles in both South Australia and Western Australia. Summers in the Arabian desert are quite intense; temperatures can reach as high as 129 Â°F.