Sensory Receptors

Sensory Receptors - Sensory receptors and neural circuits...

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Sensory receptors and neural circuits Haytham Eloqayli
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Sensory receptors Sensory receptors: organs which detect sensory stimuli . Sensory stimuli: sensation modality (touch, sound, light, pain, cold, and warmth. .etc)
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Sensory receptors Mechanoreceptors: detect mechanical compression or stretching of tissues Thermoreceptors : detect changes in temperature Nociceptors (pain receptors): detect tissue damage ( physical or chemical damage) Chemoreceptors : detect taste in the mouth, smell in the nose, oxygen level . .etc. electromagnetic receptors: detect light on the retina
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Sensory receptors
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Sensory receptors Sensory stimulus →change in receptor membrane permeability → open ion channels →allows ions to flow through membrane channels →change in transmembrane potential → receptor potential . When the receptor potential rises above the threshold for eliciting action potentials in the nerve fiber attached to the receptor → starts action potentials in the nerve The nerve transmit the action potentials to the CNS. The sensations are transmitted from the receptor to the CNS as impulses (action potentials)
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How do two types of sensory receptors detect different types of sensory stimuli? and
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This note was uploaded on 12/24/2011 for the course STEP 1 taught by Professor Dr.aslam during the Fall '11 term at Montgomery College.

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Sensory Receptors - Sensory receptors and neural circuits...

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