Approximately What Proportion of the Cerebral Cortex Has Been Estimated

question 78

Multiple Choice

Approximately what proportion of the cerebral cortex has been estimated to be involved in vision in some way?

• A) 10 percent
• B) 25 percent
• C) 50 percent
• D) 75 percent

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Definitions:

Epiglottis

A flap of cartilage at the root of the tongue, which is depressed during swallowing to cover the opening of the windpipe.

Uvula

A small fleshy extension at the back of the soft palate which hangs above the throat and plays a role in speech and swallowing.

Upper Esophageal Sphincter

The muscular ring located at the top of the esophagus that controls the passage of food into the esophagus from the throat.

Pharyngeal Phase

A phase in the swallowing process where the bolus is moved from the mouth to the esophagus involving the contraction of pharyngeal muscles.