Organs

?General properties of sense variety meat ?sense organs computer code some(prenominal) aspects of a stimulus ?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 eternal rest receptors ?baroreceptors ?D. thermal energy (thermoreceptors) ?hot and cold ?also electro-receptors & magneto-receptors confer in certain animals but not humans 2. intensity level amplitude of stimulus is coded by the frequency of action authorisations (APs) (Weber Fechner law) d 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 field of view of the sensorial surface of the body, eg, skin, that when stimulated increases the AP frequ ency of that neuron receptive field eg, in skin SN1 SN2 sensory neuron 1 sensory neuron 2 (SN1) (SN2) 4.

Sense organs tolerate the property of transduction ? operator that the energy of stimulus is altered to galvanic energy ?energy of stimulus is usually increased (amplified) or reduced during transduction stimulus Sensory receptor potential drop -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 ?ge nerated by Na influx, comonly via transient ! receptor potential channels (TRP) ?sensory potential may decline if stimulus is prolonged (called sensory edition) ?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 ground level of adaptation ?tonic receptors are non or slowly adapting ?phasic receptors are...If you involve to get a full essay, order it on our website: OrderCustomPaper.com

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