Organs

?General properties of sense organs ?sense organs regulation some(prenominal) aspects of a foreplay ?1. Modality ?all sense organs detect a specific form of heftiness of the arousal ?A. light (photo sensory(a) 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 founder in certain animals but not humans 2. strong suit amplitude of stimulant drug is coded by the frequency of action authorisations (APs) (Weber Fechner law) five hundred AP frequency (Hz) 0 stimulus intensity (log scale) 3. Location -location of stimulus is sight by the heart-to-heart field of the sensational(prenominal) neuron -the cranial orbit of the sensory(prenominal) surface of the body, eg, skin, that when st imulated increases the AP frequency of that neuron receptive field eg, in skin SN1 SN2 sensory neuron 1 sensory neuron 2 (SN1) (SN2) 4. Sense organs kick in 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 potence -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 transient receptor potential channels (TRP) ?sensory potential may decline if stimulus is prolonged (called sensory interpretation) ?sensory receptors vary in point in time of adaptation ? smart receptors are non or slowly adapting ?phasic receptors are quick adapting Sensory adaptation ?sensory recep tors vary in mark of adaptation ?tonic rec! eptors are non or slowly adapting ?phasic receptors are...If you call for to get a full essay, order it on our website: OrderCustomPaper.com

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