Organs

?General properties of sense organs ?sense organs cipher some(prenominal) aspects of a input ?1. Modality ?all sense organs detect a specific form of muscle of the arousal ?A. light (photo sense organs) ?B. chemical (chemoreceptors) ? hold (gustation) ?smell (olfaction) ?C. mechanical energy (mechanoreceptors) ?touch and pressure ?muscle stretch ?auditive and parallelism receptors ?baroreceptors ?D. thermal energy (thermoreceptors) ?hot and cold ?also electro-receptors & magneto-receptors digest in certain animals but not humans 2. durability amplitude of stimulant is coded by the frequency of action authorisations (APs) (Weber Fechner law) viosterol AP frequency (Hz) 0 stimulus intensity (log scale) 3. Location -location of stimulus is sight by the loose field of the sensational(prenominal) neuron -the surface area of the receptive surface of the body, eg, skin, that when stimulated increases the AP frequency of that neuron receptive field eg, in skin SN1 SN2 sensory(prenominal) neuron 1 sensory neuron 2 (SN1) (SN2) 4.

Sense organs befuddle the property of transduction ? operator that the energy of stimulus is altered to electric energy ?energy of stimulus is usually increased (amplified) or reduced during transduction stimulus Sensory receptor capability -40 mV sensory potential (mv) -70 mV time times of sensory potential ?the sensory stimulus generates a sensory receptor potential in the sensory cell ?usually a depolarization ?amplitude is proportional to stimulus ?generated by N a influx, comonly via transient receptor pot! ential channels (TRP) ?sensory potential may decline if stimulus is prolonged (called sensory modification) ?sensory receptors vary in point in time of adaptation ? smart receptors are non or slowly adapting ?phasic receptors are cursorily adapting Sensory adaptation ?sensory receptors vary in detail of adaptation ?tonic receptors are non or slowly adapting ?phasic receptors are...If you exigency to get a full essay, order it on our website: OrderCustomPaper.com

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