special senses review Flashcards
list 5 sense organs
eyes, ears, nose, sensory receptors, taste buds
these allow us to respond to stimuli such as touch pressure, temperature, and pain. they are microscopic receptors are located at the tips of dendrites of sensory neurons.
sensory receptors
when we experience a stimulus (taste or smell), the stimulus must be changed to a ____ signal or nerve impulse
electrical
which type of sensory receptors detect temperature.
thermoreceptors
which type of sensory receptors detect tissue damage or noxious stimuli
nociceptors
these are the sense organs found in the eyes that allow us to see
rods and cones. Photoreceptors
These are sense organs that detect chemicals, responsible for our senses of smell and taste
Chemoreceptors
We tend to think of receptors for this sense being in the skin including hair follicles, but they are also found in the tongue throat and mucous membranes which special sense is it
Touch receptors
What are free nerve endings, root hair plexus, Merkel discs, Meissner corpuscle‘s ,Pacinian corpuscles , and Ruffini corpuscles
Touch sensory receptors in the skin
Compared to other senses ____ is very hard to isolate because the sensory information enters the nervous system from multiple parts of the body. Perhaps this helps to explain referred pain.
Touch
When we are asked to put our hand in a bag with eyeballs and we put our hand in to feel peeled grapes, why do we react how we do?
Perception
The outer layer of the eye that consist of tough fibrous tissue
Sclera
The white of the eye
Sclera
The cornea is part of the front surface of the
Sclera
This part of the eye is transparent when healthy
Cornea
This part of the eye gives us our eyecolor
Iris
The mucus membrane of the eye, that lines the eyelids and covers the sclera in front when inflamed it becomes pink in cold pink eye
Conjunctiva
The black center of the iris is really a
Pupil/hole
Describe the shape of the iris
Ring shaped or donut hole shaped
We called the black center of the iris the
Pupil
When the straight fibers of the Iris contract, the pupils
Dialate
When the straight fibers of the iris contract____ light rays are permitted
More
When the circular fibers of the Iris contract, the pupils..
constrict
When the circular fibers of the iris contract_____ light rays are permitted
Fewer
The structure of the eye lies directly behind the pupil
Lens
The lens of the eye is held in place by
A ligament
As we grow older, we are more likely to become nearsighted or farsighted?
Farsighted
As we age, we lose the ability to focus on close objects, because our lenses lose some of their
Elasticity
The eye condition involving the fact that the lenses can no longer bulge enough to bring near objects into focus
Presbyopia
The eye condition known as old sightedness
Presbyopia
After a long time exposure, this may cause the lens to become hard, lose its transparency, and become milky an appearance
Uv rays
What causes cataracts?
UV light smoking and genetics
This condition may occur if one or both eyes tends to be progressive, and may result in blindness, it involves a lens being cloudy
Cataracs
What is the treatment for cataracts?
Surgery cataract surgery