Chapter 2 Flashcards
What is the duplicity theory of vision?
Refers to the retina containing 2 types of photoreceptors - rods and cones.
To which of the following structures does the duplicity theory of vision apply to?
a. Optic nerve.
b. Retina.
c. Pupil.
d. Sclera.
b - retina.
______ detects vision in low light conditions, used in night vision and motion detection.
Rods.
_______ facilitates color vision and sharp details in bright light environments.
Cones.
Define the middle ear:
An air-filled cavity containing the ossicles (the malleus, incus, and stapes)
What is the function of the outer ear?
Collecting sound waves and funneling them into the ear canal.
What is the function of the inner ear?
The inenr ear, AKA the labrynth, and contains the structures of hearing.
What is the function of the cochlea?
The cochlea, a portion of the inner ear, translates vibrations into electrical impulses that are carried to the brain by sensory nerves.
What is the iris responsible for?
Controlling the size of the pupil based on sympathetic or parasympathetic activation. This will control the amount of light passing through the lens and to the retina.
A dysfunction in the Iris would most likely result in:
a. Poor sensory adaptation.
b. Loss of vision in the affected eye.
c. Inability to see the color blue.
d. Visual field loss.
a - poor sensory adaptation, because the iris changes the size of the pupil.
Inability to see the color blue would be due to dysfunction in the cones.
Visual field loss would be due to disruptions in the visual pathway through the brain.
____________ law refers to the observed quantifiable and proportional difference in how senses are perceived.
Webers.
