SPECIAL SENSES - Collin Collegeiws.collin.edu/ngrose/F2011 BIOL2401/Special Senses.pdf · 5 Special...
Transcript of SPECIAL SENSES - Collin Collegeiws.collin.edu/ngrose/F2011 BIOL2401/Special Senses.pdf · 5 Special...
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SPECIAL SENSES Chapter 17
animals.nationalgeographic.com
randommealoftheday.blogspot.com
http://www.flickr.com/photos/klimari1/3739710668/
http://desktopwallpaper-s.com/12-3D-
Art/-/Sound/ carlsafina.org
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5 Special Senses
Olfaction
Gustation
Vision
Equilibrium
Hearing
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CHEMICAL SENSES Olfaction & Gustation
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OLFACTION
Nasal concha
Olfactory epithelium
Olfactory receptor
cells
Olfactory Pathways
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OLFACTORY
RECEPTORs
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GUSTATION
Lingual papillae
filiform, fungiform,
circumvallate
Taste Receptors
Basal cells
Gustatory cells
Taste pore
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GUSTATORY
RECEPTORS
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GUSTATORY
DISCRIMINATION
Sweet
Salty
Sour
Bitter
Umami
Water
Calcium
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Vision
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Vision • Lacrimal gland produces tears:
• Water & lysozyme
• Tears combine with oil from tarsal gland
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Vision • Three Tunics (Layers)
• Fibrous
• Vascular
• Sensory
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VISION
Lens
fibrous capsule
suspensory
ligaments
crystallin protein
Accommodation
http://rstb.royalsocietypublishing.org/content/366/1568/1250.abstract
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VISUAL PHYSIOLOGY
Photoreceptors detect photons within visible light
spectrum
Rods are used in dim light
peripheral and night vision
Cones are use in bright light
Sharp and color vision
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RODS & CONES
Discs
Rhodopsin=Opsin+Retinal
Dark adaptation
Light adaptation
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COLOR BLINDNESS
Non-functional cones
Protanope
Deuteranope
Tritanope
http://colorvisiontesting.com/what%20colorblind
%20people%20see.htm
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PHOTORECEPTION
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PHOTORECEPTION
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RETINAL PROCESSING Ganglion cells are
diverse
M cells
On-center neurons
Off-center neurons
P cells
Horizontal cells
Amacrine cells
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VISUAL PATHWAYS
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HEARING &
EQUILIBRIUM
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EAR ANATOMY
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INNER EAR
Three chambers
Scala tympani
Scala vestibuli
Scala media
(cochlear duct)
Spiral organ of corti
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SOUND Measured in
wavelengths
Frequency or cycles
Hertz=cycles per
second
Pitch
Amplitude
Decibels=sound
energy
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HEARING PROCESS
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AUDITORY PATHWAYS
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EQUILIBRIUM
Static equilibrium
Saccule & utricle
Dynamic equilibrium
Semicircular ducts
(canals)
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SEMICIRCULAR DUCTS
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UTRICLE & SACULE
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EQUILIBRIUM
PATHWAYS