Which Statement Best Describes the Vertebrate Mechanism That Operates on the Outer

question 65

Multiple Choice

Which statement best describes the vertebrate mechanism that operates on the outer segment cell membrane of the rod in the presence of light?

• A) cGMP detaches from the sodium channels, causing them to close.
• B) cGMP that is attached to the sodium channels causes them to open.
• C) Light activates rhodopsin by isomerizing retinal from cis to trans.
• D) Light activates rhodopsin by isomerizing retinal from trans to cis.

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