An action potential is an electrical signal that propagates down the length of a nerve cell, the axon . It is generated by the axonal membrane , which...
An action potential is an electrical signal that propagates down the length of a nerve cell, the axon. It is generated by the axonal membrane, which is a thin layer surrounding the axon.
The action potential is caused by a change in the resting membrane potential of the axon. This change in membrane potential creates a depolarization, which is a decrease in the resting potential.
When the depolarization reaches a certain threshold, it causes an action potential to be generated. The action potential is an all-or-nothing electrical signal that propagates down the axon in a one-directional manner.
Each action potential is generated by a node of Ranvier, which is a small region of the axonal membrane that is responsible for generating action potentials. The action potential causes the release of neurotransmitters from the axon terminals, which are the structures on the end of the axon that communicate with other neurons.
The action potential is a critical mechanism for communication between neurons. It allows neurons to rapidly transmit information over long distances