The mechanism of the reflex arc Sensory neurons (or afferent neurons or receptor neurons) are nerve cells within the nervous system responsible for converting external stimuli from the organism's environment into internal electrical motor reflex loops and several forms of involuntary behavior, including pain avoidance. Inhumanos, such reflex circuits are commonly located in the spinal cord. The sensory neurons carry signals from a wide range of receptors which include: Baroreceptors Chemoreceptors Mechanoreceptors Nociceptors Photoreceptors Proprioceptors Taste buds Thermoreceptors At the molecular level, these sensory receptors located on the cell membrane of sensory neurons are responsible for the conversion of stimuli into electrical impulses. The type of receptor employed by a given sensory neuron determines the type of stimuli it will be sensitive to. Por ejemplo, neurons containing mechanoreceptors are sensitive to tactile stimuli, while olfactory receptors make a cell sensitive to odors. In complex organisms, sensory neurons then relay their information to the central nervous system or in less complex organisms, such as the hydra, directly to motor neurons and sensory neurons also transmit information to the brain, where it can be further processed and acted upon. Por ejemplo, olfactory sensory neurons make synapses with neurons of the olfactory bulb, where the sense of olfaction (oler) is processed. This information can be used by organisms to make decisions on whether to eat a particular piece of food, or whether a potential partner is ready to mate. Contenido 1 Types 2 Ver también 3 References & Bibliography 4 Textos clave 4.1 Libros 4.2 Papeles 5 Material adicional 5.1 Libros 5.2 Papeles 6 External links Types Main article: Sensory fiber types There are several types of sensory nerve fibers, depending on their modality etc. Examples are: GSA, GVA, SSA, SVA, fibers (Ia, Ib or Golgi, II or Aβ, III or Aδ or fast pain, IV or C or slow pain) See also Afferent nerve Afferent pathways Auditory neurons Receptive fields Taste disorders Type Ia sensory fiber Nerve Pseudounipolar neuron References & Bibliography This article or section does not cite its references or sources. You can help the Psychology Wiki by introducing appropriate citations. Key texts Books Papers Additional material Books Papers External links v·d·e Histology: nervous tissue Neurons (gray matter) soma, axon (axon hillock, axoplasm, axolemma, neurofibril/neurofilament), dendrite (Nissl body, dendritic spine, apical dendrite, basal dendrite) types (bipolar, pseudounipolar, multipolar, pyramidal, Purkinje, granule) Afferent nerve/Sensory nerve/Sensory neuron GSA, GVA, SSA, SVA, fibers (Ia, Ib or Golgi, II or Aβ, III or Aδ or fast pain, IV or C or slow pain) Efferent nerve/Motor nerve/Motor neuron GSE, GVE, SVE, Upper motor neuron, Lower motor neuron (α motorneuron, γ motorneuron) Synapses neuropil, synaptic vesicle, neuromuscular junction, electrical synapse - Interneuron (Renshaw) Sensory receptors Free nerve ending, Meissner's corpuscle, Merkel nerve ending, Muscle spindle, Pacinian corpuscle, Ruffini ending, Olfactory receptor neuron, Photoreceptor cell, Hair cell, Taste bud Glial cells astrocyte, oligodendrocyte, ependymal cells, microglia, radial glia Myelination (white matter) Schwann cell, oligodendrocyte, nodes of Ranvier, internode, Schmidt-Lanterman incisures, neurolemma Related connective tissues epineurium, perineurium, endoneurium, nerve fascicle, meninges This page uses Creative Commons Licensed content from Wikipedia (ver autores).
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