BIO271H1 Lecture : Lecture 3
Document Summary
Sensory physiology: chemoreception: neurotransmitter receptor function, ionotrophic receptors. chemoreceptors: chemicals www. notesolution. com, for example, smell and taste. mechanoreceptors: pressure and movement, for example, touch, hearing, balance, blood pressure. thermoreceptors: temperature, sensory systems, tranduction: the process by which receptor cells change stimulus energy into the energy of a nerve impulse, all receptors transduce incoming stimuli into changes in membrane potential. signal sent to integrating center (central nervous system: graded potentials, generator potential. sensory receptor is also the primary afferent neuron. change in membrane potential spreads along membrane: receptor potential. sensory receptor is separate from the afferent neuron. change in membrane potential triggers release of: sensitivity to multiple modalities neurotransmitter, adequate stimulus. preferred (most sensitive) stimulus modality: many receptors can be excited by other stimuli, if sufficiently strong. Pressure on eyelid perceive light: polymodal receptors. sensitive to more than one stimulus modality www. notesolution. com.
