A pause that occurs after an ectopic beat in which the SA node is unaffected and the cadence of the heart is uninterrupted is called:

If you mix 3 gm of active ingredient with 10 gm of ointment base, the resulting concentration is:

A) 33%. B) 23%. C) 30%. D) 0.3%.

Respiratory system malignancies include cancer of the:

A) larynx. B) lungs. C) both A and B. D) neither A nor B.