Yawning redirects here. For the fish species, see Yawning (fish) . A yawn is a reflex consisting of the simultaneous inhalation of air and the stretching of the eardrums, followed by an exhalation of breath.Yawning (oscitation) most often occurs in adults immediately before and after sleep, during tedious activities and as a result of its contagious quality. yawn is a reflex consisting of the simultaneous inhalation of air and the stretching of the eardrums, followed by an exhalation of breath. Yawning (oscitation) most often occurs in adults immediately before and after sleep, during tedious activities and as a result of its contagious quality.
A radiological emergency is an emergency in which there is, or is perceived to be, a hazard due to radiation exposure from a source. As sources of radiation are used in various fields, including industry, medicine and research, radiological emergencies may occur anywhere. These are examples of radiological emergency situations and associated conditions that a first responder may face: 1  Medical Symptoms of Radiation Exposure. 2  Loss or Theft of Dangerous Radioactive Source. 3  Public Radioactive Contamination/Exposure.
How to Call an Ambulance. Three Parts: Calling the Ambulance Spotting Emergencies Providing Assistance While Waiting Community Q&A. If you are ever in a life-threatening emergency, the ability to call an ambulance is a very useful skill. It is important to always have the emergency number for your area memorized. Being composed and prepared to... If you are ever in a life-threatening emergency, the ability to call an ambulance is a very useful skill.