Joan's Pupil Appears to Get Larger and Then Smaller as She

question 56

Multiple Choice

Joan's pupil appears to get larger and then smaller as she moves from room to room. This change in size is caused by changes in the __________ and is due to changes in __________.

• A) fovea; size of her visual field
• B) rods and cones; changing visual stimuli
• C) pupillary opening; changes from monocular to dichromatic light
• D) iris; amount of incoming light

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Definitions:

Circular

Having the shape of a circle; round.

Pennate

Refers to a type of muscle fiber arrangement where fibers are attached obliquely to a central tendon, resembling a feather structure.

Inferior Oblique

A muscle in the orbit that acts as one of the extraocular muscles, contributing to the movement of the eye, particularly in the upward and outward direction.

Lateral Rectus

A muscle in the eye responsible for moving the eyeball outward, away from the midline of the body.