Category: nervous system

As mediators sinaptich e tion transmission is now known a large number of chemical substances, the list of which has not yet been completed. Neurotransmitters are divided into several groups: acetylcholine, serotonin, catecholamine (dopamine, n of p-epinephrine, adrenalin), amino

Pot n tial action came on the presynaptic fiber to the synapse, Ring s Vaeth membrane depolarization, which comprises a calcium pump, and calcium ions are transferred into the synapse. Once in the cytoplasm of synaptic the Finishing and Nia, calcium

Synapse – it morphofunctional about nal CNS formation which provides signal transmission with no minutes Rhone to another neuron or effector cell (muscle secret p reversed). Synapse includes three components: presynaptic of membrane and on, and the postsynaptic membrane synaptic cleft, t.   e.   It comprises e e cops and the

Neuroglia – an extensive Various of own group of cells (glial cells or glial cells), neural tissue, providing the activity of neurons and operate the support, mp about fichekuyu, dividing, barrier, secretory and protective (and m munologicheskuyu) function. Glial cells are 3–4

Neuron by a PDP may be per e give information to other cells, but one neuron itself is not m about Jette perform functions specific to the CNS. For these purposes, it is necessary and possible to combine various neurons into single

The action potential (AP) represents the transient change of the potential difference between the outer and inner surfaces of the membrane (or tissue between two points), to about Thoroe arises at the time of excitation. When registering

The membrane potential (MP) is the potential difference between naru w hydrochloric and inner surfaces of the membrane of the excitable cells in its rest conditions. On average, in cells of excitable tissues, MP reaches 50 –

Excitability as a special and zoned property of individual cells of an organism is caused by the presence of special properties in them, which are determined by the structure and function of their q and toplasmic membrane. Selective permeability of the membrane

Biochemical classification of neurons It based on chemical wasps on the singularity of neurotransmitters used by neurons in the synaptic transmission of nerve impulses. Many different groups of neurons are distinguished, in particular, cholinergic (mediator – acetylcholine), adrenergic (mediator

Functional classification of neurons divides them by the nature of the functions performed by them (according to their place in the reflex arc) into three types: the afferent (sensory), efferent (and mot-inflammatory) and associative. 1. Afferent neurons (synonyms – sensitive,