Why would stroke volume increase with an increase in the sympathetic nervous system or an increase in calcium?

Opium, methamphetamine, and cocaine are in the united states.

C(x)=(2x^2+5x)/(x^3+8) what is maximum c(x)?

Anurse is reviewing the medical record of a client who is receiving vancomycin daily. the nurse should review which of the following laboratory results prior to administering the next dose? a. blood glucose level b. serum creatinine level c. total iron-binding count d. thyroid-stimulating hormone level