Sensory physiology Smell (olfaction) – the cells

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Presentation transcript:

Sensory physiology Smell (olfaction) – the cells Taste (gustation) – the cells, transduction and current through channels Vision – neural cells of the retina transduction

Olfaction Humans can smell about 10,000 different odours How many receptor proteins for odours are there? Odorant receptors are G-protein coupled receptors The G protein is called Golf

Dark current Membrane is depolarized at rest  Neurotransmitter is released

Photon strikes rhodopsin Membrane potential hyperpolarizes  less neurotransmitter is released

Convergence in the retina Also, lateral inhibition

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