is afferent neuron b Receptor regulates afferent neuron To CNS Afferent neuron Afferent neuron To CNS Receptor protein Sensory receptor Stimulus Neurotransmitter Sensory receptor ID: 779076
Download The PPT/PDF document "Sensory Receptors (a) Receptor" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
Sensory Receptors
Slide2(a) Receptor
is
afferent neuron.
(b) Receptor
regulates afferent neuron.
To CNS
Afferentneuron
Afferentneuron
To CNS
Receptorprotein
Sensoryreceptor
Stimulus
Neurotransmitter
Sensoryreceptorcell
Stimulus
Stimulus
leads to
neuro-
transmitter
release.
Figure 50.3
Slide3Figure 50.4a
(a) Single sensory receptor activated
Gentle pressure
Sensory receptor
More pressure
Low frequency of
action potentials per receptor
High frequency of
action potentials per receptor
Slide4Figure 50.4b
(b) Multiple receptors activated
Sensory receptor
Gentle pressure
More pressure
Fewer
receptors
activated
More
receptorsactivated
Slide5Gentle pressure, vibration,
and temperature
Connective
tissue
Hair
Pain
Epidermis
Dermis
Hypodermis
Nerve
Hair movement
Strong
pressure
Figure 50.5
Slide6Figure 50.24
Papillae
Papilla
Taste
buds
(a) Tongue
Key
Sweet
Salty
Sour
Bitter
Umami
Taste bud
Sensory
neuron
Sensory
receptor cells
Food
molecules
Taste
pore
(b) Taste buds
Slide7Slide8Figure 50.25
Odorants
Brain
Nasal cavity
Receptors
for different
odorants
Plasma
membrane
Odorants
potentials
Action
Olfactorybulb
Bone
Epithelialcell
Chemo-receptor
Cilia
Mucus
Slide9Slide10Sclera
Suspensory
ligament
Cornea
Iris
Pupil
Aqueous
humor
Lens
Vitreous humor
Optic disk
Central
artery andvein of the retina
Opticnerve
Fovea
Retina
Choroid
Figure 50.17aa
Slide11Retina
Neurons
Photoreceptors
Rod
Cone
Optic
nerve
fibers
Ganglion
cell
Amacrinecell
Bipolarcell
Horizontal cell
Pigmentedepithelium
Figure 50.17ab
Slide12CYTOSOL
INSIDE OF DISK
Retinal
Opsin
Rhodopsin
Figure 50.17bb
Slide13Figure 50.18
Light
Inactive
rhodopsin
Active
rhodopsin
Transducin
Phosphodiesterase
INSIDE OF DISK
Diskmembrane
CYTOSOL
GMP
cGMP
Na
Na
EXTRA-
CELLULAR
FLUID
Plasma
membrane
Dark
Light
Hyper-
polarization
Time
0
40
70
Membrane
potential (mV)
Slide14Outer ear
Middle ear
Inner ear
Skull
bone
Malleus
Incus
Stapes
Semicircular
canals
Auditory nerve
to brain
Cochlea
Eustachiantube
Roundwindow
Oval
window
Tympanic
membrane
Auditory
canal
Pinna
Figure 50.10a
Slide15Figure 50.10b
Cochlear
duct
Bone
Auditory
nerve
Vestibular
canal
Tympaniccanal
Organof Corti
Slide16Figure 50.10c
Tectorial membrane
Basilar
membrane
Hair cells
Axons of
sensory
neurons
To auditorynerve
Slide17Figure 50.10d
1
m
Bundled hairs projecting from a hair cell
Slide18Figure 50.12
Tympanic
membrane
Cochlea
Stapes
Base
(a)
Round
window
Point A
A
A
10
Tympaniccanal
Basilarmembrane
Point B
B
B
20
Point C
C
C
30
Apex
Vestibular
canal
Oval
window
Axons of
sensory neurons
(b)
3
3
3
0
0
0
0
Distance from oval window (mm)
6,000 Hz
1,000 Hz
100 Hz
Relative motion of basilar membrane
Slide19Semicircular
canals
Vestibular
nerve
Vestibule
Utricle
Saccule
PERILYMPH
Fluid
flow
Cupula
Hairs
Haircell
Nervefibers
Body movement
Figure 50.13
Slide20Slide21