39)SensorySystSpr11Postred

39)SensorySystSpr11Postred - Sensory Biology Unity of Life...

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1 Sensory Biology Unity of Life Input, integration, output Receive information - Today Unity: Membrane properties Diversity: Specialized cells/organs Integrate information - so far Unity: Within cell integration Diversity: Various specialized communication and integration among cells (e.g. CNS, endocrine) Make an appropriate response Unity: Surprising similarity, e.g. interaction of contractile proteins 46.2 Today - Sensory systems Unity of Life Physicochemical Diversity of Life Umwelt Particular focus on the evolution of eyes 46.2 Sensation, Transduction, Perception Classes of stimuli Chemo-, mechano-, electromagneto-, electro-, magneto- Stimulus->_____________>Nerve -> CNS Sensation Integration Perception Transduction Communication Stimulus
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Mechanoreception - Vertebrates Based on specialized receptor cells - Hair cells Release neurotransmitter to a sensory neuron at a basal rate 46.4a Mechanoreception - Vertebrates Based on specialized receptor cells - Hair cells Release neurotransmitter to a sensory neuron at a basal rate Membrane permeability, and release of NT, influenced by mechanical stimulation Directional! 46.4b Mechanoreception - Vertebrates Based on specialized receptor cells - Hair cells Release neurotransmitter to a sensory neuron at a basal rate Membrane permeability, and release of NT, influenced by mechanical stimulation Directional! Mechanoreception - Vertebrates Based on specialized receptor cells - Hair cells Forms the basis for a wide variety of vertebrate “senses” E.g. Balance, gravity, rotation, acceleration, hearing, lateral line, etc. 46.6
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39)SensorySystSpr11Postred - Sensory Biology Unity of Life...

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