When decreased in concentration, which of the following formed elements could result in hypoxia?

What method of delivering medication to the heart risks a rupture and so should only be used as a last resort?

A) Intrapleural injection B) Intracardiac injection C) Digoxin inhalation D) Digitalis patch

________ proteins interact with one another in chain reactions similar to those of the clotting system

A) Compliant B) Complacent C) Complement D) None of the above