An action potential is a very rapid change in membrane potential that occurs when a nerve cell membrane is stimulated. Specifically, the membrane potential goes from the resting potential (typically -70 mV) to some positive value (typically about +30 mV) in a very short period of time (just a few milliseconds).eurons can respond to stimuli and conduct impulses because a membrane potential is established across the cell membrane. In other words, there is an unequal distribution of ions (charged atoms) on the two sides of a nerve cell membrane.
Aardvarks are small pig-like mammals that are found inhabiting a wide range of different habitats throughout Africa, south of the Sahara. They are mostly solitary and spend their days sleeping in underground burrows to protect them from the heat of the African sun, emerging in the cooler evening to search for food.
The Predator is a fictional extraterrestrial species featured in the Predator science-fiction franchise, characterized by its trophy hunting of other species for sport.he Predator dispatches the soldiers one by one with a vast array of weaponry until Major Dutch Schaeffer (Arnold Schwarzenegger) is the last one alive. Dutch eventually confronts the creature, covering himself in mud to hide his heat signature from the Predator's thermal imaging, and setting up numerous booby traps.