What Happens When Rods and Cones Are Exposed to Light

question 517

Multiple Choice

What happens when rods and cones are exposed to light?

• A) They undergo accommodation.
• B) They undergo a chemical reaction that results in a neural signal.
• C) They become more light-sensitive and thus cause an increase in visual acuity.
• D) They create problems with dark adaptation in the fovea.

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Definitions:

Water Table

The level below the Earth's surface where the ground is completely saturated with water, forming the upper surface of the groundwater.

Ground Water

Underground water stored in soil or within rock pores and cracks.

Hydraulic Gradient

The slope of the water table or potentiometric surface, indicating the direction and rate of groundwater flow.

Limestone Cave

A natural underground space formed by the dissolution of limestone rock by water.