A Sunscreen with an SPF of 30 Protects the Skin

question 21

Multiple Choice

A sunscreen with an SPF of 30 protects the skin from ________ of ultraviolet B radiation.

• A)85%
• B)90%
• C)93%
• D)97%

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Definitions:

Eardrum

The membrane that vibrates in response to sound waves, transmitting these vibrations to the ossicles in the middle ear.

Basilar Membrane

A key structure in the cochlea of the inner ear, which plays a crucial role in the sense of hearing by vibrating in response to sound waves.

Oval Window

A membrane-covered opening that leads from the middle ear to the vestibule of the inner ear, playing a key role in the process of hearing by transmitting sound vibrations.

Cochlea

A spiral-shaped, fluid-filled inner ear structure responsible for converting sound waves into nerve impulses to be interpreted by the brain.