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.
The largest deserts in the world are polar deserts: the Antarctic Desert and the Arctic Desert. The Antarctic Desert covers an area of 13,829,430 square kilometers over the South Pole. Antarctica is the most extreme continent on Earth, as the coldest, driest and windiest place in the world ,and the highest elevation.he largest deserts in the world are polar deserts: the Antarctic Desert and the Arctic Desert. The Antarctic Desert covers an area of 13,829,430 square kilometers over the South Pole. Antarctica is the most extreme continent on Earth, as the coldest, driest and windiest place in the world ,and the highest elevation.