We Identify the Direction of a Source of Sound by Attending

question 22

Multiple Choice

We identify the direction of a source of sound by attending to the

• A) difference between responses from the left ear and those from the right ear.
• B) velocity of impulses coming from hair cells in the basilar membrane.
• C) changes in loudness from the beginning of the sound to the end of the sound.
• D) difference between the responses of hair cells at the stirrup end of the basilar membrane and responses of hair cells at other locations.

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Definitions:

Inferior Vena Cava

The large vein that carries deoxygenated blood from the lower and middle parts of the body into the right atrium of the heart.

Right Ventricle

The chamber of the heart responsible for pumping deoxygenated blood to the lungs via the pulmonary artery.

Mitral Valve

A valve in the heart located between the left atrium and left ventricle that allows blood to flow one way: from the atrium into the ventricle.

Aortic Semilunar Valve

A valve in the heart located between the left ventricle and the aorta, preventing backflow of blood into the left ventricle.