PSYC 280 Study Guide - Membrane Potential, Middle Ear, Sensory System

• School: Simon Fraser University
• Department: Psychology
• Course: PSYC 280
• Professor: John Reynolds

Document Summary

Sensory receptor organs: act as filters of the enviro: they detect and respond to some events but not others. Receptor cells: within organs and detect stimuli and convert them into language of the nervous system: electrical signals then the info from sensory receptor organs enters the brain as action potentials. Types of receptor organs: detectors for infrared radiation (snakes), electrical fields (fish), earth"s magnetic field (dolphins) Mechanical: touch, pain, hear, vestibular (head movement, orientation), joint, muscle. Chemical: smell, taste, common chemical (change in co2), vomeronasal (pheromones in air, water) Electrical: electroreception (difference in density if electrical currents) Adequate stimulus: a given sensory organ is particularly adapted. But bats can hear vibrations 50,000 hz : unlike humans, birds and bees see ultraviolet range of light. These energy" from senses: action potentials, but brain recognize dif type of sensation because each sensation sends its action potential to separate nerve tracts: labeled lines.