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.
Physical signs of spina bifida may include: 1  Leg weakness and paralysis. 2  Orthopedic abnormalities (i.e., club foot, hip dislocation, scoliosis) 3  Bladder and bowel control problems, including incontinence, urinary tract infections, and poor kidney function. 4  Pressure sores and skin irritations. 5  Abnormal eye movement.