On Average, 2- and 3-Year-Olds Sleep _______ Hours Per Day

question 43

Multiple Choice

On average, 2- and 3-year-olds sleep _______ hours per day, while 4- to 6-year-olds sleep _______ hours.

• A) 10 to 11; 11 to 12
• B) 11 to 12; 10 to 11
• C) 11 to 12; 13 to 14
• D) 13 to 14; 11 to 12

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Definitions:

Oval Window

A membrane-covered opening that leads from the middle ear to the cochlea of the inner ear, playing a key role in hearing.

Tympanic Membrane

Also known as the eardrum, it is a thin membrane that separates the outer ear from the middle ear and vibrates in response to sound waves.

Stapes

The smallest bone in the human body, located in the middle ear, which plays a key role in transmitting sound vibrations to the inner ear.

Vestibule

An entrance or enclosed antechamber between the outside and the interior of a building, or a space or cavity at the beginning of a canal, like those of the nose or ear.