Although the Cortex Makes Up 80% of the Volume of the Human

question 81

Multiple Choice

Although the cortex makes up 80% of the volume of the human brain, it is only 2 to 3 millimeters thick. This is possible because of its numerous __________.

• A) separate layers
• B) spirals
• C) distinct pockets, or "compartmentalization"
• D) convolutions and fissures

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Definitions:

Barium Enema

A radiologic procedure performed by a radiologist who administers barium sulfate through the anus, into the rectum, and then into the colon to help diagnose and evaluate obstructions, ulcers, polyps, diverticuloses, tumors, or motility problems of the colon or rectum; also called a lower GI (gastrointestinal) series.

Clear Liquid Diet

A diet that consists of clear liquids and foods that become liquid at room temperature. It's often prescribed before medical tests, procedures, or surgeries.

Laxatives

Medications or substances used to stimulate bowel movements or ease constipation.

Angiography

An X-ray examination of a blood vessel, performed after the injection of a contrast medium, that evaluates the function and structure of one or more arteries or veins.