Which portion of the spinal column consists of five fused vertebrae in the average adult?

Our blood transports oxygen from the lungs to the cells and returns with what bi-product of metabolism?

A) Lactic acid B) Carbonic acid C) Carbon dioxide D) Carbon monoxide

Which of the following conditions can lead to airway obstruction?

A) Dyspnea B) Apnea C) Epiglottitis D) Jaundice