PHGY 214 Lecture 10: PHGY214 W3L3 Rose Notes
14 Feb 2017
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If it is truly a receptor, should convert that into an electrical signal. Sensory 1 how do they convert mechanical signal to something that the nervous system can understand action potential, called transduction. Taking chemical energy, thermal, mechanical, to something the nervous system can understand, a change in membrane potential. Bring probe and advance until it pushes into the end of the axon. (cid:449)he(cid:374) p(cid:396)o(cid:271)e tou(cid:272)hes, it (cid:396)ises, a(cid:374)d (cid:449)he(cid:374) it"s take(cid:374) a(cid:449)a(cid:455), it (cid:272)a(cid:448)es (cid:271)a(cid:272)k. Gives us information about the intensity of the stimulus (unlike action potentials that are all or none) Need a device that will convert the stimulus into a response that is corresponding to the intensity of the stimulus. With stretch, the channels open which leads to the depolarization through the movement of the ions. Rapidly adapting receptors: good device to tell when stimulus occurred, but not duration.
