Question

73 multiple choice 1 point the main function of this structure is to regulate the amount of light entering the eyeball through the pupil. retina cornea iris choroid 74 multiple choice 1 point ______ means water on the brain? it is caused when csf drainage is obstructed. encephalitis meningitis parkinsons hydrocephalus

Explanation:

Question 73

To solve this, we analyze each option:

• Retina: Contains photoreceptors, not for light regulation.
• Cornea: Refracts light, not regulate light amount.
• Iris: Controls pupil size to regulate light entering via pupil.
• Choroid: Supplies blood to eye, not light regulation.

Analyze each option:

• Encephalitis: Brain inflammation, not related to CSF obstruction.
• Meningitis: Meninges inflammation, not "water on brain".
• Parkinson’s: Neurodegenerative, not CSF-related.
• Hydrocephalus: "Water on brain", caused by obstructed CSF drainage.

Answer:

C. iris

Question 74