Sunday, 16 October 2011

biology assignment

1. What is coeliac disease?
Celiac disease is a digestive disease that damages the small intestine and interferes with absorption of nutrients from food. People who have celiac disease cannot tolerate gluten, a protein in wheat, rye, and barley. Gluten is found mainly in foods but may also be found in everyday products such as medicines, vitamins, and lip balms.


When people with celiac disease eat foods or use products containing gluten, their immune system responds by damaging or destroying villi—the tiny, fingerlike protrusions lining the small intestine. Villi normally allow nutrients from food to be absorbed through the walls of the small intestine into the bloodstream. Without healthy villi, a person becomes malnourished, no matter how much food one eats.


Villi on the lining of the small intestine help absorb nutrients.

2. What happens to a person with coeliac disease? 




Symptoms of celiac disease vary from person to person. Symptoms may occur in the digestive system or in other parts of the body. Digestive symptoms are more common in infants and young children and may include
  • abdominal bloating and pain
  • chronic diarrhea
  • vomiting
  • constipation
  • pale, foul-smelling, or fatty stool
  • weight loss

Adults are less likely to have digestive symptoms and may instead have one or more of the following:
  • unexplained iron-deficiency anemia
  • fatigue
  • bone or joint pain
  • arthritis
  • bone loss or osteoporosis
  • depression or anxiety
  • tingling numbness in the hands and feet
  • seizures
  • missed menstrual periods
  • infertility or recurrent miscarriage
  • canker sores inside the mouth
  • an itchy skin rash called dermatitis herpetiformis

3. Treatment - how do we deal with coeliac disease?



The only treatment for celiac disease is a gluten-free diet. Doctors may ask a newly diagnosed person to work with a dietitian on a gluten-free diet plan. A dietitian is a health care professional who specializes in food and nutrition. Someone with celiac disease can learn from a dietitian how to read ingredient lists and identify foods that contain gluten in order to make informed decisions at the grocery store and when eating out.
A gluten-free diet means not eating foods that contain wheat, rye, and barley. The foods and products made from these grains should also be avoided. In other words, a person with celiac disease should not eat most grain, pasta, cereal, and many processed foods.




http://digestive.niddk.nih.gov/ddiseases/pubs/celiac/