The two most common malignant bone tumors of childhood are osteosarcoma and sarcoma; the most common presenting symptom of both cancers is

Produced by the catalyzes the formation of angiotensin i which is not as potent as that preferentially acts on the arteriole. a. angiotensinogen, liver, vasoconstrictor, ang ii, efferent b. anp, right atrium, vasodilator, nitric oxide, afferent c. renin, kidney, vasoconstrictor, ang ii, efferent d. ace, lungs, vasoconstrictor, thromboxane, afferent e. two of the choices