chapter 10 Flashcards
detected by sensory organs that exist as individual cells or receptor units
general senses
widely distributed throughout the body
general senses
detected by large and complex organs, or localized grouping of sensory receptors
special senses
sensory receptor types
capsulated / unencapsulated
type of stimuli (mode)
free or naked
unencapsulated
presence of covering capsule
encapsulated
type of stimuli or mode required to activate receptors
photoreceptor
chemoreceptors
pain receptors
thermoreceptors
mechanoreceptors
all sense organs have common functional characteristics
detect stimuli
generation of nerve impulse
mode in general senses
stimulus or change a receptor/sense is able to detect
examples of general sensory receptors
free nerve ending, muscle spindle, organ, corpuscle
pain, discrimintive touch, tickle, temperature
free nerve ending
touch and possibly cold
bulboid corpuscle (krause end bulb)
pressure and high frequency vibration
lamellar corpuscle (pacini)
fine touch & low frequency vibration
tactile corpuscle (meissner)
touch and pressure
bulbous corpuscle (ruffini)
proprioception (muscle tension)
tendon organ (golgi tendon)
propriorception (muscle length)
muscle spindle
________ sense organs are also found in deep organs of the body
general sense organs
layers of eyeball
fibrous layer (outer)
vascular layer
inner layer
outer fibrous layer of eyeball contains
sclera
cornea
conjunctiva
lacrimal gland
tough outer coat of eyeball
fibrous layer
white of eye
sclera
transparent part over iris
cornea
mucous membrane that covers front of fibrous layer and extends to eyelids
conjunctiva
secretes tears that moisten conjunctiva
lacrimal gland
layer of eyeball that has dense network of blood vessels
vascular layer
vascular layer of eyeball contains
choroid
iris
lens
ciliary muscle
pigmented melanin rich layer prevents scattering of light
choroid
colored part of eye, contains pupil, construction/dilation of smooth muscle
iris
transparent body behind pupil, focuses or refracts light rays on retina
lens
front of vascular layer, edge of iris, contraction effects shape of lens, altering focus
ciliary muscle
inner layer of eyeball contains
retina
innermost sensory layer of eyeball
inner layer
contains various kinds of photoreceptors
retina
retina contains these photoreceptors
rods
cones
ganglion cells
receptors for night and peripheral vision
rods
receptors for day and color vision
cones
receptors for changing light patterns of days, months, seasons
ganglion cells
2 eye fluids called
aqueous humor
vitreous humor
anterior chamber in front of lens
aqueous humor
posterior chamber behind lens
vitreous humor
The innermost coat of the eyeball is the:
retina
Specialized receptors found near the point of junction between tendons and muscles are called:
proprioceptors
The ability to distinguish one touch stimulus from two is called:
two-point discrimination
Cones are densely concentrated in the:
fovea centralis