With what stage does one full sleep cycle begin?

A patient with severe chest pain hands you a bottle of nitroglycerin. After reading the label, you determine that the medication expired two months ago. You should:

A) administer two of the nitroglycerin tablets. B) withhold the medication and transport. C) administer the nitroglycerin orally. D) place one tablet under the patient's tongue.

Organisms that cause diseases are correctly called:

A) pathogens. B) toxins. C) antigens. D) antibodies.