<prompt> Which is not seen in hyperventilation?SeizuresAlkalosisHypocalcemia and hypophosphatemiaHypocalcemia and hyperphosphatemia  <response>: D Hypocalcemia and hyperphosphatemia Alkalemia associated with hypocapnia may produce neurologic symptoms, including dizziness, visual impairment, syncope, and seizure activity secondary to cerebral vasoconstriction; paresthesia, carpopedal spasm, and tetany secondary to decreased free serum calcium; and muscle weakness secondary to hypophosphatemia; and may be associated with panic attacks. Severe alkalemia can also induce cardiac arrhythmias and evidence of myocardial ischemia. Patients with a primary respiratory alkalosis are also prone to periodic breathing and central sleep apnea. 