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.
Signs and Symptoms. Symptoms of fibroids may include: 1  Heavy Vaginal Bleeding â Excessively heavy or prolonged menstrual bleeding is a common symptom. 2  Women describe soaking through sanitary protection in less than an hour, passing blood clots and being unable to leave the house during the heaviest day of flow.