Multiple Choice
In the vertebrate eye, the __________ focuses light on the photoreceptors.
46. Sensory Systems
Sensory System
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A human born with nonfunctional rhodopsin would __________.
A
lack color vision
B
be unable to see in bright light
C
be totally blind
D
be unable to obtain a sharp image by looking straight at an object
E
be unable to see in dim light
Verified step by step guidance1
Understand the role of rhodopsin: Rhodopsin is a pigment found in the rod cells of the retina, which are responsible for vision in low-light conditions.
Recognize the function of rod cells: Rod cells are crucial for night vision and seeing in dim light, as they contain rhodopsin that helps detect light intensity.
Consider the consequences of nonfunctional rhodopsin: If rhodopsin is nonfunctional, the rod cells cannot effectively detect light, leading to difficulty seeing in dim light.
Differentiate between rod and cone cells: Cone cells are responsible for color vision and function well in bright light, while rod cells are essential for vision in low-light conditions.
Conclude the impact on vision: A person with nonfunctional rhodopsin would struggle to see in dim light, as their rod cells would not be able to perform their function properly.
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