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Ask Doctor Cory.

Dear Dr. Cory:

Why do we have eyebrows

Greg Barton Columbus, Ohio

Dear Greg:

Eyebrows, like eyelashes, help to protect out eyes by preventing water and sweat from dripping into them. Eyebrows also help us to communicate as they move with different facial expression.

Dear Dr. Cory:

Why do we yawn? Is it to get more air into our mouths or to breathe better?

Shannon Smith Burry, Vermont

Dear Shannon:

Yes, yawning is a way for the body to get extra oxygen and to help wake us up. When we yawn, we breathe in slowly and deeply and then let air back out.

Yawning also helps to open our eustachian tube, the tube that connects the middle ear to the back of the throat. We feel the need to open our eustachian tube when there is a change in air pressure, like when we go up or down in an elevator or an airplane.

Dear Dr. Cory:

How does a gallstone get into your gallbladder?

Elizabeth M. Quinn Rutherford, North Carolina

Dear Elizabeth:

Gallstones get into the gallbladder because that's where they are made. The gallbladder is connected to the liver and small intestine by small ducts, or tubes. The gallbladder stores bile, a greenish-yellow liquid made by the liver. Bile helps to break down fats as our bodies digest food.

Gallstones are mostly made of cholesterol and a small amount of calcium salts. The acids in bile usually keep the level of cholesterol from getting too high. If the amount of cholesterol in the bile gets too high, the acids can no longer keep the cholesterol in balance. The cholesterol then crystallizes, causing the stones to form.

Gallstones form in the gallbladder of people who usually have a high level of cholesterol in their blood and are overweight. But thin people with normal cholesterol levels can also get gallstones.

Gallstones can be as small as a grain of sand or as big as a golf ball. Some people may have only one; others may have hundreds. If a gallstone blocks one of the ducts, it can cause severe pain.

[ILLUSTRATION OMITTED]

Sight Night

Last October 31, thousands of volunteers across the country went door-to-door in their neighborhoods and collected 33,000 pairs of used eyeglasses to support Give the Gift of Sight's international optical missions. The collected glasses were cleaned, repaired, and hand-delivered to people in developing countries who need glasses but cannot afford them.

This year, organizers hope to collect 75,000 pairs of used eyeglasses to supply the ten optical missions in developing countries. The mission volunteers provide free eye exams and then match the individuals with the donated eyeglasses.

All types of glasses are needed, including children's and adults' prescription glasses and sunglasses, and non-prescription (regular) sunglasses.

Be a Sight Night Volunteer

Have fun and help others see better. Collect used eyeglasses when you trick or treat with your parents on October 31. Your parents can drop off the glasses at the nearest LensCrafters store.

Your friend, Cory SerVaas, M.D.

Send your health questions to: "Ask Doctor Cory" Children's Playmate P.O. Box 567 Indianapolis, IN 46206

Or e-mail your question to: askdrcory@childrensplaymatemag.org

This column does not replace your doctor's advice.
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No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2000 Gale, Cengage Learning. All rights reserved.

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Title Annotation:Questions and Answers; the use of eyebrows, and other topics, are discussed
Author:SerVaas, Cory
Publication:Children's Playmate
Date:Oct 1, 2000
Words:538
Previous Article:COUNTING in SPANISH.
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