â¢ One plate is pushed beneath the other, or equivalent description. â¢ A trench may be formed at the subduction zone. (ii) Explain how subduction leads to volcanic activity. (2 points: 1 point for a correct explanation of one plate being pushed down and melted and 1. point for a correct explanation of molten material /magma rising to the surface near the zone)
Symptoms of atrial fibrillation occur when the upper chambers of the heart (atria) beat in a disorganized fashion. Atrial fibrillation is a type of arrhythmia. Characteristic symptoms include shortness of breath, palpitations, and lightheadedness.
This is the cause of gastrointestinal or bowel symptoms in people with cystic fibrosis. The most common bowel symptom related to cystic fibrosis is diarrhea. Stools also commonly appear greasy, bulky and foul-smelling. Stools may also appear pale and clay-colored [source: PubMed Health]. Another common symptom is blockage of the intestines, which leads to excessive gas, constipation and stomach pain. Intestinal blockage is especially common in newborns with cystic fibrosis. A distended, or swollen, abdomen is the result of severe constipation.