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 hyena is a carnivorous dog-like species of animal, native to parts of both Africa and Asia. There are four known species of hyena, the spotted hyena, the striped hyena, the brown hyena and the aardwolf. Hyenas are scavenger mammals meaning that the hyena tends to eat another animals kill, rather than the hyena actually catching its own food.