Eye Flashcards
Neurons devoted to visual processing take up about ________ percent of the cortex.
30
The anterior cavity is between the _______ and the ________ whereas the anterior chamber is between the cornea and iris
Cornea, lens
Due to the cornea being avascular, it receives much of its oxygen and nutrients from ________.
Tears
The choroid plexus within the ciliary body secretes ________/min of aqueous humor.
2μl
Aqueous humor is replaced every ________.
2 hours
The trabecular meshwork of the eye causes resistance and creates a pressure of ________.
15 mmHg
What are the two possible anatomical causes of glaucoma?
Iris and lens pinch off space between anterior and posterior chamber
Canal of Schlemm is blocked
Cone pigments are called ________ and rod pigments are called ________.
Photopsins, rhodopsins
Protanopia is color blindness due to lack of ________ pigment. It is found on the ________ chromosome.
Red, X
Deuteranopia is color blindness due to lack of ________ pigment. It is found on the ________ chromosome.
Green, X
Tritanopia is color blindness due to lack of ________ pigment. It is found on the ________ chromosome.
Blue, seventh
Müller cells expand across the entire length of the ________ and provide ________ support to the other neuronal cells.
Retina, structural
Müller cells enhance the ________ ratio and ________ intraretinal light scattering
Signal/noise, minimize
Horizontal cells are found in the ________.
Inner nuclear layer
Horizontal cells ________ inputs from photoreceptors and provide ________ to photoreceptors.
Summate, negative feedback
Bipolar cell nuclei are found within the ________.
Inner nuclear layer