The ICD-10-CM code for acute recurrent serous otitis media of both ears is _____

A new onset of atrial fibrillation is dangerous to a patient because:

a. they are at risk for developing blood clots. b. the rhythm usually becomes tachycardic. c. cardiac output decreases. d. atrial fibrillation usually degrades into a more critical rhythm.

The functional unit of the lungs, where gas exchange occurs, are the:

A) arterioles. B) bronchioles. C) alveoli. D) capillaries.