Organs

?General properties of sense organs ?sense organs engrave some(prenominal) aspects of a rousing ?1. Modality ?all sense organs detect a specific form of competency of the arousal ?A. light (photo receptors) ?B. chemical (chemoreceptors) ? hold (gustation) ?smell (olfaction) ?C. mechanical energy (mechanoreceptors) ?touch and pressure ?muscle stretch ?auditive and agreement receptors ?baroreceptors ?D. thermal energy (thermoreceptors) ?hot and cold ?also electro-receptors & magneto-receptors impart in certain animals but not humans 2. forte amplitude of input 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 opened field of the sensational(prenominal) neuron -the sweep of the receptive surface of the body, eg, skin, that when stimulated increases the AP frequency of that neuron receptiv e field eg, in skin SN1 SN2 sensorial neuron 1 sensory neuron 2 (SN1) (SN2) 4.

Sense organs need the property of transduction ? operator that the energy of stimulus is altered to galvanizing energy ?energy of stimulus is usually increased (amplified) or reduced during transduction stimulus Sensory receptor dominance -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 Na influx, comonly via t ransient receptor potential channels (TRP) ! ?sensory potential may decline if stimulus is prolonged (called sensory accommodation) ?sensory receptors vary in point in time of adaptation ? smart receptors are non or slowly adapting ?phasic receptors are quickly adapting Sensory adaptation ?sensory receptors vary in score of adaptation ?tonic receptors are non or slowly adapting ?phasic receptors are...If you demand to get a full essay, order it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper