You encounter a person who has been pulled from a swimming pool unresponsive and not breathing. What is the best description for what you suspect has occurred?
a. Drowning due to opioid overdose.
b. Sudden cardiac arrest due to ventricular fibrillation.
c. Secondary cardiac arrest due to drowning.
d. Choking due to airway obstruction.

Will treating a viral infection with antibiotics affect the course of the infection? a) no; antibiotics work by inhibiting enzymes specific to bacteria. antibiotics have no effect on eukaryotic or virally encoded enzymes. b) no; antibiotics do not kill viruses because viruses do not have dna or rna. c) yes; antibiotics activate the immune system, and this decreases the severity of the infection. d) yes; antibiotics can prevent viral entry into the cell by binding to host-receptor proteins.