SENSORY PERCEPTION Types of receptors, associated organs 1
Jan 01, 2016
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Functions?
Convert energy into a change in membrane potential of sensory receptors
Four major functions: Sensory transduction – convert stimulus
energy into change in membrane potential Amplification – strengthening stimulus
energy Transmission – carry stimulus to CNS Integration – processing sensory
information
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Types of Sensory Receptors
Mechanoreceptors Chemoreceptors Electromagnetic receptors Thermoreceptors Pain receptors
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Chemoreceptors
General: (total solute concentration) Osmoreceptors in brain – stimulate thirst
Specific: (individual kinds of molecules) Glucose, oxygen, carbon dioxide, amino
acids
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Electromagnetic receptors
Detect various forms of electromagnetic energy Visible light: Photoreceptors (Eyes) Electricity (Fish that detect prey that
disturb electric currents) Magnetism (Animals that migrate sense
magnetic fields)
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Thermoreceptors
Respond to heat, cold Signal both surface and body core
temperature Much debate on where these are in
humans… (encapsulated or naked?) Communicate with hypothalamus
(body’s thermostat)