Within Picoseconds of a Photon Being Absorbed by Rhodopsin

question 5

Multiple Choice

Within picoseconds of a photon being absorbed by rhodopsin,

• A) retinal undergoes photoisomerization, shifting from 11-cis retinal to all-trans retinal.
• B) opsin changes configuration to metarhodopsin II.
• C) rhodopsin is regenerated and able to bind photons again.
• D) the membrane potential of the photoreceptor is altered.
• E) the outer segment of the photoreceptor separates from the inner segment.

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Definitions:

Acquisition

Acquisition in the context of psychology refers to the initial stage of learning when a response is first established or a new skill is begun to be acquired.

Classical Conditioning

Learning through the relationship between a naturally present stimulus and one that comes from the environment.

Extinction

In the context of psychology, it refers to the gradual diminishing of a conditioned response when the reinforcement or the association with a stimulus is removed.

Operant Conditioning

An educational method where the intensity of an action is altered by either encouraging or penalizing it.