Biochemistry 2280A Study Guide - Quiz Guide: Olfaction, Afferent Nerve Fiber, Taste

• School: Western University
• Department: Biochemistry
• Course: Biochemistry 2280A
• Professor: Mclachlin

Document Summary

Sensory systems: general properties of sensory systems. Stimulus some kind of energy source; internal or external. Receptors (sensory receptors) - transduce (modify) stimulus and transmit it to the nervous system (the integrating center) cns integration. Afferent pathway (sensory neurons) from periphery towards cns. Sensation - action potentials that reach the brain via sensory neurons (afferent neurons) Perception - interpretation of the action potentials that reach the brain (not in simple reflex pathways) Ofactory bulk and center of emotions (amygdala) and memory (hippocampus) are all part of the limbic system. Sensations are action potentials that reach the central nervous system via sensory neurons. Endolymph is relatively high in k+ (unusual) => upon opening of the voltage-gated k+ channel, the hair cell depolarizes; in rest partially depolarized: fishes use lateral line system. Invertebrates - organs for equilibrium (stratocyst) are different from organs of hearing: chemoreceptors chemicals (molecular concentration), e. g. , smell, taste.