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Study Guide

[343] - Final Exam Guide - Comprehensive Notes for the exam (27 pages long!)


Department
physics
Course Code
343
Professor
Jiang
Study Guide
Final

Page:
of 27
BU
343
FINAL EXAM
STUDY GUIDE
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What is sensory physiology?
The study of how sensory stimuli are transduced by sensory receptors and processed by the
nervous system.
Incoming stimulus is detected by sensory receptors (mechanoreceptors, photoreceptors, etc.) and
the message is sent as an action potential through the afferent neuron to the integrating center
(brain, ganglia).
The sensory system includes the sense organ, the afferent sensory neuron and the area of the
brain to which these neurons project. For example the visual system includes eyes, the optic
nerves and the brain areas concerned with processing visual information.
A sense organ is receptor cells with accessory non-neural tissues, ex: the eye.!
Sensory receptors are cells that are specialized to detect incoming sensory stimuli (ex: rods and
cones).!
The receptor proteins are on the membranes of sensory receptors (cells) specialized to detect
incoming sensory signals (ex: opsin).
What is a sensory receptor? Extero vs Interoceptors
There is human-centered classification of senses that we consciously use; sight, smell, hearing,
taste and touch. This classification was first developed by Aristotle over 2000 years ago.
Can also be classified based on location:
! Exteroreceptors: detect stimuli occurring on the outside of the body (pressure,
temperature etc.) !
! Interoreceptors: detect stimuli occurring inside the body (blood pressure, blood
oxygen, etc.). help with the regulation of !
internal systems. Based on stimulus modality: !
! Chemical: chemoreceptors !
! Mechanical: mechanoreceptors !
! Light: photoreceptors !
! Temperature: thermoreceptors !
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