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All of the following are abnormal patterns of respiration EXCEPT:

  1. Apnea

  2. Dyspnea

  3. Eupnea

  4. Tachypnea

The correct answer is: Apnea

Apnea is defined as the absence or cessation of breathing. This is an abnormal pattern of respiration and therefore not included in the options for this question. The other options all relate to abnormal patterns of breathing Dyspnea is difficulty or labored breathing, Eupnea is normal breathing, and Tachypnea is rapid or shallow breathing.