Bio-151 Chapter 44

Transduction
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Terms in this set (31)
Transduction
conversion of one form of energy into another. In sensation, the transforming of stimulus energies, such as sights, sounds, and smells, into neural impulses our brains can interpret.

Sent to the CNS (i.e action potentials)
What are the 6 specialized sensory receptors?
Mechanoreceptors
Photoreceptors
Chemoreceptors
Thermoreceptors
Nocioreceptors
Magnetorecptors
Auditory signals
Stimuli:
Anatomy:
Sensory receptors:
Transduction:
Stimuli: sound; wavelike changes in air pressure

Anatomy: Ear structure designed to receive sound and convert signals

Sensory receptors: mechanoreceptors

Transduction: sound waves become an action potentials that carry signals of stimuli to the brain
Sensory cells _________ external stimulus into _______ ____________ that are sent to the CNS
Sensory cells transduce external stimulus into action potentials that are sent to the CNS
Potential cascade
cell depolarizes in response to the appropriate stimulus
All stimulus are transduced to a change in __________ __________

i.e. light, sound, touch, pain, smell, taste
Membrane Potential
Transmission
Carrying of the signals to the CNS
Signals are transmitted to the what?
To the brain (CNS)
What is the form of transmission
Action potentials
Propagating down axon
synapse
What is the job of the sensory receptors?
Pick up stimuli, convert stimuli to signals, and carry those signals to the brain
Hearing receptors:specific frequencies of sound are detectedBoth the ___________ and ___________ can vary ontogentically, among individuals, and among speciesspecificity and sensitivitySensory receptors can also be _____.tunedNarrow part of basilar membrane is _____; vibrates in response to _____ frequenciesstiff; highWide part of basilar membrane is _______; vibrates in response to ____ frequenciesflexible; lowMechanoreceptors:detect singals of pressure changes; i.e. hearing, touch, posture-changes, air/water pressurePhotoreceptorsdetect wavelength of light signals. VisionChemoreceptors:detect molecules. Includes taste and smellThermoreceptors:detect temperature changes; feeling warm or coldNociceptorsdetect harmful stimuli. PainMagnetoreceptorsdetect magnetic fieldsThe ear ear drum ear ossciles cochleathe anatomical features that help receive and pick up soundSensory receptors do what?pick up stimuli convert stimuli to signals carry those signals to the brainThe brain(CNS) __________ that signal and _____ _ _______ signal back to the body so that it can _______ appropriatelyThe brain interprets that signal and sends a response signal back to the body so that it can respond appropriatelySensory receptors are ________specificMechanoreceptors:Detect signals of pressure change. Includes hearing, touch, posture-changes, air/water pressure i.e. skin, nose, and earsPhotoreceptors:detect wavelength of light signals i.e visionChemoreceptors:detect molecules i.e. taste and smellThermoreceptorsdetect changes in temperatureNociceptorsdetect harmful stimuli; painMagnetoreceptorsdetect magnetic fields