When oxygenated blood leaves the lungs, it returns to the _____ of the heart

Moderate cervical dysplasia–CIN II:

A) N87.1. B) N87.9. C) N87.0. D) N81.89.

____ in the heart will both increase the speed of the heart as well as the strength of contraction.

A. Alpha-blockers B. Beta-blockers C. Beta-receptors D. Diuretics