The Absorption of Light by a Rhodopsin Molecule in a Rod

question 202

Multiple Choice

The absorption of light by a rhodopsin molecule in a rod cell initiates a signal cascade beginning with the

• A) opening of a sodium channel.
• B) closing of a large number of sodium channels.
• C) formation of an activated phosphodiesterase molecule.
• D) activation of transducin molecules.
• E) activation of other rhodopsin molecules.

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