Närvilõpmeni

Närvilõpmeni refers to the terminal end of a nerve fiber. These structures are crucial for transmitting nerve impulses to other neurons, muscles, or glands. When an electrical signal, known as an action potential, reaches the närvilõpmeni, it triggers the release of chemical messengers called neurotransmitters. These neurotransmitters then diffuse across a small gap called the synapse and bind to receptors on the target cell, initiating a response.

There are different types of närvilõpmeni. Axon terminals are the most common, forming the presynaptic component of a synapse. However, some nerve fibers may have specialized endings, such as sensory receptors that detect stimuli from the environment, or motor endings that directly innervate muscle fibers to cause contraction.

The structure of a närvilõpmeni typically includes synaptic vesicles, which are small sacs containing neurotransmitters. It also contains mitochondria to provide energy for the process and proteins involved in the release and recycling of neurotransmitters. The precise structure and function of a närvilõpmeni are highly dependent on the type of neuron and the specific synapse it forms. Dysfunction of närvilõpmeni can lead to various neurological disorders.