9. on an ecg reading of one cardiac cycle, the depolarization of the main mass of the ventricles is represented by the wave.

a) q
b) t
c) r
d) p

R waves correspond to depolarization of the main mass of the ventricles so it’s the largest wave (pg 358 in the third edition of Colville and Bassert Clinical Anatony and Physiology for Veterinary Technicians)

The answer is C) R

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.