Which hemodynamic parameter would be most decreased when hypovolemia is present?

Which of the following can cause acute ventilatory failure?

I. Guillian-Barre syndrome II. General anesthesia III. Head trauma IV. Myasthenia gravis a. I, II, III, and IV c. II and III only b. I, II, and IV only d. I and IV only

The term res ipsa loquitur refers to cases in which the ____. 

A. patient has a previously existing condition B. doctor's mistake is completely obvious C. patient has already filed a lawsuit D. doctor's error was caused by faulty record keeping E. patient failed to follow medical advice