1. 5 special senses
How are they carried?: vision, hearing, equilibrium, taste, smell
specialized organs containing receptor cells-carry impulses by way of specialized somatic
and visceral afferents.
2. Touch is what type of sense?
Is the organ specialized?: Somatic No. Uses general receptors composed of modified
dendrites of sensory neurons.
3. Organ responsible for sight: eye
4. 3 layers of the eye-outer to inner: Sclera(posterior, "whites of the eyes")+cornea
(anterior, transparent)
Choroid, ciliary muscle, iris
Sensory layer-retina, lens, vitreous body
5. What fills the space between the cornea and lens: Aqueous humor
6. Choroid of the eye:
Location
Function
Contains what?: Posterior middle portion of eye
Prevents light from dispersing from the eye
Highly vascular and supplies blood to other layers of the eye
, Portage Learning A&P 2 Module 3
7. Ciliary body of the eye
Location
Function: Anterior middle portion
Changes the shape of the lens, allowing it to focus
8. Iris of the eye Location:
Contains:
Function:: Anterior to the ciliary body in the middle layer of the eye
Contains the circular colored portion of the eye
Controls the amount of light to let into the pupil.
-Uses muscle fibers to contract or dilate based on environmental light.
9. Retina of the eye
Layer
Contents:
Function: Inner sensory layer
Photoreceptors-two types (rods and cones)
Rods- Stimulated in dark light. More sensitive to light but to not generate sharp or color
images.
Cones-Operate in bright light. Help generate sharp color images.
10. Lens Location: posterior to the iris and pupil