As an action potential travels down the axon, there is a change in polarity across the membrane. The Na + and K + gated ion channels open and close as the membrane reaches the threshold potential, in response to a signal from another neuron.everal types of cells support an action potential, such as plant cells, muscle cells, and the specialized cells of the heart (in which occurs the cardiac action potential). However, the main excitable cell is the neuron, which also has the simplest mechanism for the action potential.
Dream bears are sometimes associated with possessive mothers, since mother bears have a powerful instinct to protect their cubs. If a mother bear and her cubs appear in a dream, this may indicate a desire to have children or to protect your children from danger. Bears in dreams are also associated with victory over competitors or rivals in love. They are often about power, an imbalance of power, or the use of power. The dream bear is linked to concepts like grumpiness, over-protectiveness, and hibernation or retreat.
Bear. Sometimes said to represent a possessive mother, and the feelings this has aroused. But in many cases the bear will represent a meeting with dangerous emotions such as fear, anger or being easily aroused.There might also be associations with independence, or strength.See: Dreams are Like a Computer Game; Animal.ecause of traditional cultural associations, and its ability to hibernate, the bear can represent the ability to die and be reborn. In some dreams it is powerful, possessiveness or represents a smothering relationship, as or by a parent or lover. So it could suggest a desire to withdraw or hibernate.