BIOC32H3 Lecture Notes - Lecture 13: Cochlear Duct, Vestibular Duct, Postcentral Gyrus
Document Summary
Lecture 13: sensory physiology: special senses: always conscious, and get processed. Vision, hearing, taste, smell, equilibrium (balance: somatic senses: pain, itch, touch, temperature, body position. Ph and blood pressure: subconscious reflexes: hypothalamus: detect changes in ph and blood pressure. Integrate most of the sensory information (e. g. vision, taste, blood pressure) Exception: smell information goes directly to olfactory bulb, does not process in hypothalamus. General properties of sensory system: activated by stimulus as in physical energy (e. g. lightwaves, soundwaves, stimulus activates sensory receptor. Signal transduction: convert physical stimulus into electrical intracellular signal (graded potential) Generator /receptor potential: changes in membrane potential (vm), similar to graded potential: conduct ap to cns when threshold has reached, integration of signal in cns: Type of sensory receptor: sensory receptors are classified by structures, olfactory / somatosensory receptor: have free nerve endings, not always myelinated, somatosensory receptor: found in skins, have enclosed nerve endings. Myelinated = faster conduction: auditory, visual and gustatory receptors:
