Portage Learning - A&P 2 - Module 3
What are the five special senses? - correct answer smell, taste, sight, hearing, equilibrium
(balance)
What do the five special senses all have in common? - correct answer these senses have
specialized organs containing receptor cells.
carry their impulses by specialized somatic and visceral afferents
Touch - correct answer somatic sense that does not have a specialized sense organ
- instead uses general receptors composed of modified dendrites of sensory neurons
What kind of feelings does touch include? - correct answer pressure, pain, vibration, heat and
the combined information is carried in general somatic afferents and general visceral afferents
eye - correct answer organ of vision
Three layers of the eye - correct answer Outer fibrous layer
Intermediate vascular layer
Deep inner layer
outer fibrous layer - correct answer sclera and cornea
Sclera - correct answer white of the eye; maintains the shape of the eye and protects the
delicate inner layers of tissue; located on the posterior part of the eye
Cornea - correct answer transparent tissue where light enters the eye; anterior portion of the
eye; enters through the pupil and then gets into the retina
aqueous humor - correct answer the clear fluid filling the space in the front of the eyeball
between the lens and the cornea.
middle layer of eye - correct answer choroid, ciliary body, iris
choroid - correct answer Dark pigmented vascular layer which stops light being reflected
around the inside of the eye
Why is the choroid dark in color? - correct answer - the darkness helps to absorb light
- prevents light from dispersing throughout the eye; we want the light directed right onto the
retina so that the photoreceptors can pick up the light
Why is the choroid highly vascular? - correct answer supplies blood and other nutrients to the
other layers of the eye
ciliary body - correct answer Structure surrounding the lens that connects the choroid and iris.
It contains ciliary muscles, which control the shape of the lens, allows it to focus
, Portage Learning - A&P 2 - Module 3
Iris - correct answer a ring of muscle tissue that forms the colored portion of the eye around
the pupil and controls the size of the pupil opening
- controls the amount of light let into the pupil, a hole in the center of the iris
Inner sensory layer - correct answer retina
Retina - correct answer Light sensitive layer of the eye; contains rods and cones
Rods - correct answer the more numerous cells that are stimulated in a dim light
- more sensitive to light but do not generate the sharp or color images
Cones - correct answer retinal receptor cells that are concentrated near the center of the retina
and that function in daylight or in well-lit conditions. The cones detect fine detail and give rise
to color sensations.
lens - correct answer the transparent structure behind the pupil and iris that changes shape to
help focus images on the retina
vitreous body - correct answer helps to stabilize the eye and give physical support to the retina
vitreous fluid - correct answer jellylike substance found behind the lens in the posterior cavity
of the eye that maintains its shape
What is the order of how light passes through the eye? - correct answer 1. Cornea
2. Aqueous Humor
3. Lens
4. Vitreous Humor
5. Retina
6. Optic Nerve
7. Optic Tracts
8. LGN of thalamus
9. Occipital Lobe
10. Interpreted vision
Vision Pathway Steps - correct answer - Light passes through into the eye through the aqueous
humor, lens, and vitreous humor to the posterior surface of the retina
Vision Pathway Steps pt. 2 - correct answer - Photoreceptors in the retina send a signal through
the optic nerve to the optic chiasm, located at the base of the hypothalamus
What are the five special senses? - correct answer smell, taste, sight, hearing, equilibrium
(balance)
What do the five special senses all have in common? - correct answer these senses have
specialized organs containing receptor cells.
carry their impulses by specialized somatic and visceral afferents
Touch - correct answer somatic sense that does not have a specialized sense organ
- instead uses general receptors composed of modified dendrites of sensory neurons
What kind of feelings does touch include? - correct answer pressure, pain, vibration, heat and
the combined information is carried in general somatic afferents and general visceral afferents
eye - correct answer organ of vision
Three layers of the eye - correct answer Outer fibrous layer
Intermediate vascular layer
Deep inner layer
outer fibrous layer - correct answer sclera and cornea
Sclera - correct answer white of the eye; maintains the shape of the eye and protects the
delicate inner layers of tissue; located on the posterior part of the eye
Cornea - correct answer transparent tissue where light enters the eye; anterior portion of the
eye; enters through the pupil and then gets into the retina
aqueous humor - correct answer the clear fluid filling the space in the front of the eyeball
between the lens and the cornea.
middle layer of eye - correct answer choroid, ciliary body, iris
choroid - correct answer Dark pigmented vascular layer which stops light being reflected
around the inside of the eye
Why is the choroid dark in color? - correct answer - the darkness helps to absorb light
- prevents light from dispersing throughout the eye; we want the light directed right onto the
retina so that the photoreceptors can pick up the light
Why is the choroid highly vascular? - correct answer supplies blood and other nutrients to the
other layers of the eye
ciliary body - correct answer Structure surrounding the lens that connects the choroid and iris.
It contains ciliary muscles, which control the shape of the lens, allows it to focus
, Portage Learning - A&P 2 - Module 3
Iris - correct answer a ring of muscle tissue that forms the colored portion of the eye around
the pupil and controls the size of the pupil opening
- controls the amount of light let into the pupil, a hole in the center of the iris
Inner sensory layer - correct answer retina
Retina - correct answer Light sensitive layer of the eye; contains rods and cones
Rods - correct answer the more numerous cells that are stimulated in a dim light
- more sensitive to light but do not generate the sharp or color images
Cones - correct answer retinal receptor cells that are concentrated near the center of the retina
and that function in daylight or in well-lit conditions. The cones detect fine detail and give rise
to color sensations.
lens - correct answer the transparent structure behind the pupil and iris that changes shape to
help focus images on the retina
vitreous body - correct answer helps to stabilize the eye and give physical support to the retina
vitreous fluid - correct answer jellylike substance found behind the lens in the posterior cavity
of the eye that maintains its shape
What is the order of how light passes through the eye? - correct answer 1. Cornea
2. Aqueous Humor
3. Lens
4. Vitreous Humor
5. Retina
6. Optic Nerve
7. Optic Tracts
8. LGN of thalamus
9. Occipital Lobe
10. Interpreted vision
Vision Pathway Steps - correct answer - Light passes through into the eye through the aqueous
humor, lens, and vitreous humor to the posterior surface of the retina
Vision Pathway Steps pt. 2 - correct answer - Photoreceptors in the retina send a signal through
the optic nerve to the optic chiasm, located at the base of the hypothalamus
