Which of These Statements Describes the Circular Muscle of the Iris

question 372

Multiple Choice

Which of these statements describes the circular muscle of the iris

• A)It contracts in response to bright light to produce pupillary constriction.
• B)It is innervated by the sympathetic nervous system.
• C)It contracts to slacken the suspensory ligaments and increase the strength of the lens during accommodation.
• D)It is under voluntary control.

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Definitions:

Variable-Interval

A schedule of reinforcement where a response is rewarded after an unpredictable amount of time has passed.

Variable-Ratio

Refers to a schedule of reinforcement where a response is reinforced after an unpredictable number of responses, which is used in behavior modification and operant conditioning.

Fixed-Interval

In the context of psychology, a schedule of reinforcement where rewards are given after a specific, constant amount of time has passed.

Stimulus Generalization

The tendency for a conditioned response to be triggered by stimuli similar to the original conditioning stimulus.