21Senses06x

21Senses06x - Proximate overview genes(mostly lay neural...

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Proximate overview - genes (mostly) lay neural & structural template - environment (development & learning) interacts with genes to shape - input from external environment to sensory receptors thru internal circuits to decision centre to internal machinery to mechanics - mediators? - electricity or hormones
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Senses (without sensibility)
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Name those senses! - sight & photoreceptors - sound & mechanoreceptors - pressure and balance & mechanoreceptors - smell and taste & chemoreceptors - others: temperature, pain, electrical, position, stretch - receptors modified neurons
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Neurons - polarised resting potential from ion differences across membrane (all cells) - stimulus depolarises (e.g., photoreceptor pigments & chemical change) - ions across membranes create action potential along axon; all or none - synapses via neurotransmitters (e.g., acetylcholine) - refractory period, inhibitory & excitatory
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Brains - nerve nets to ganglia to 1 central processor - can be bypassed (reflex arc) - wiring & cross-wiring & redundancy - why located where?
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21Senses06x - Proximate overview genes(mostly lay neural...

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