What Causes CGMP to Convert to GMP and Close Na⁺

question 145

Multiple Choice

What causes cGMP to convert to GMP and close Na⁺ channels in a photoreceptor?

• A)dark current
• B)light
• C)darkness
• D)opsin

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Definitions:

Inner Ear

The innermost part of the ear, containing structures responsible for hearing (cochlea) and balance (vestibular system).

Basilar Membrane

A key structure in the cochlea of the inner ear, which plays a critical role in the sensory processing of sound through its vibration.

Oval Window

A membrane-covered opening located at the base of the stapes bone in the middle ear that transmits sound vibrations to the cochlea.

Moon Illusion

A visual phenomenon which causes the Moon to appear larger near the horizon than it does higher up in the sky.