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내몸감각기관수용체

감각 수용체 종류 : 감각세포

세포종류 :- 암세포, 감각세포, 신경세포  
신호전달
- 감각세포 : Receptor 종류
- 신경세포 : 전기신호, 신경전달물질, 호르몬
- 감각연합 : 신호증폭
- 7TM : G protein
- 6TM : 온각

- 지능형 센서







후각세포 : 30~60일 간격 재생
후각수용기 : 인간 5~6백만개, 토끼 1억개, 개 2억2천만개
뇌의 후각신경구 5%, 쥐등 야행성동물 약 20%

미뢰 : 인간 9,000개, 돼지 토끼등 포유류 15,000 ~ 18,000개

Taste : 미뢰
Total number of human taste buds (tongue, palate, cheeks) = 10,000
Number of taste buds on the tongue = 9,000
Height of taste bud = 50-100 microns  
Diameter of taste bud = 30-60 microns
Number of receptors on each taste bud = 50-150
Diameter of taste receptor = 10 micron
Diameter of taste fiber = less than 4 micron
Taste threshold for quinine sulfate = 3.376 mg/liter water

Smell
Number of human olfactory receptor cells = 12 million
Number of rabbit olfactory receptor cells = 100 million
Number of dog olfactory receptor cells = 1 billion
Number of bloodhound olfactory receptor cells = 4 billion
Surface area of olfactory epithelium (contains olfactory receptor cells) in humans = 10 cm2
Surface area of bloodhound olfactory epithelium = 59 in2
Area of olfactory epithelium in some dogs = 170 cm2  
Area of olfactory epithelium in cats = 21 cm2
Thickness of olfactory epithelium mucous layer = 20-50 microns.
Diameter of olfactory receptor axons = 0.1-0.2 micron
Diameter of distal end olfactory receptor cell = 1 micron
Diameter of olfactory receptor cell = 40-50 micron
Number of cilia per olfactory receptor cell = 10-30
Length of cilia on olfactory receptor cell = 100-150 micron
Concentration for detection threshold of musk = 0.00004 mg/liter air

Vision
Length of eyeball (adult) = 24.2 mm
Length of eyeball (newborn) = 16.5 mm
Volume of eyeball = 5.5 cm3
Weight of eyeball = 7.5 g
Average time between blinks = 2.8 seconds
Average duration of a single blink = 0.1-0.4 seconds
Thickness of cornea = ~0.5 mm in center; ~1 mm in periphery
Diameter of cornea = 11.5 mm
Thickness of lens = 4 mm
Diameter of lens = 9 mm
Composition of lens = 65% water; 35% protein
Nerves in lens = 0
Blood vessels in lens = 0
Number of retinal receptor cells = 5-6 million cones; 120-140 million rods
Number of retinal ganglion cells = 800 thousand to 1 million
Number of fibers in optic nerve = 1,200,000
Number of neurons in lateral geniculate body = 570,000
Number of cells in visual cortex (area 17) = 538,000,000
Wavelength of visible light (human) = 400-700 nm
Amount of light necessary to excite a rod = 1 photon
Amount of light necessary to excite a cone = 100 photons
Location of the greatest density of rods = 20o from fovea
Highest density of rods = 160,000 per mm2
Peak density of rods (cat) = 400,000 per mm2
Density of cones in fovea = 200,000 per mm2
Diameter of fovea = 1.5 mm
Intraocular pressure = 10-20 mm Hg
Volume of orbit = 30 ml
Area of retina = 2,500 mm2
Thickness of retina = 120 microns (ranges from 100 to 230 microns)
Production rate of aqueous humor = 2 microliters/min
Turnover of aqueous humor = 15 times/day
% volume of eye occupied by the vitreous = 80%
Maximal sensitivity of red cones = 570 nm
Maximal sensitivity of green cones = 540 nm
Maximal sensitivity of blue cones = 440 nm
More Facts and Figures about the Human Retina from WebVision.

Audition
Surface area of the tympanic membrane = 85mm2
Length of the eustachian tube = 3.5 to 3.9 cm
Number of hair cells in cochlea = 3,500 inner hair cells; 12,000 outer hair cells
Number of fibers in auditory nerve = 30,000
Length of auditory nerve = 2.5 cm
Number of neurons in cochlear nuclei = 8,800
Number of neurons in inferior colliculus = 392,000
Number of neurons in medial geniculate body = 570,000
Number of neurons in auditory cortex = 100,000,000
Most sensitive range of human hearing = 1,000-4,000 Hz
Length of external auditory meatus (ear canal) = 2.7 cm
Diameter of external auditory meatus (ear canal)= 0.7 cm
Weight of malleus = 23 mg; length of malleus = 8-9 mm
Weight of incus = 30 mg; dimensions of incus = 5 mm by 7 mm
Weight of stapes = 3-4 mg; dimensions of stapes = 3.5 mm high, 3 mm long, 1.4 mm wide
Length of cochlea = 35 mm
Width of cochlea = 10 mm
Number of turns in the cochlea = 2.2-2.9
Length of basilar membrane = 25-35 mm
Width of basilar membrane = 150 microns (at base of cochlea)
Auditory Pain Threshold = 130 db
Threshold for hearing damage = 90 db for an extended period of time

Touch
Weight of skin (adult human) = 9 lb.(4.1 kg)
Surface area of skin (adult human) = 3,000 in2 (~1.8 m2)
Number of tactile receptors in the hand = 17,000
Number of nerve endings in hand = 1,300 per in2
von Frey threshold (Face) = 5 mg
2 point threshold (Finger) = 2-3 mm
Length of Meissner corpuscle = 90 - 120 micron
Density of receptors on finger tips = 2,500 per cm2
Density of Meissner's corpuscles on finger tips = 1,500 per cm2
Density of Merkel's cells on finger tips = 750 per cm2
Density of Pacinian corpuscles on finger tips = 75 per cm2
Density of Ruffini's corpuscles on finger tips = 75 per cm2
Thermal pain threshold = 45oC




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페이스북 올리기            방명록           수정 2015-06-26 / 등록 2010-09-20 / 조회수 : 17777 (134)



우리의 건강을 해치는 불량지식이 없는 아름다운 세상을 꿈꾸며 ...  2009.12  최낙언