How does digoxin exert an inotropic effect on the myocardium?
a. By reversibly inhibiting the Na+/K+-ATPase pump
b. By stimulating the vagus nerve
c. By increasing extracellular sodium concentrations
d. By pumping calcium out of the cell
ANS: A
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In the collection of blood cultures from infants, which of the following is the preferred antiseptic to use prior to blood collection?
A. Chlorhexidine gluconate B. 70% isopropyl alcohol C. Betadine D. Iodine
How long does a full-face laser resurfacing generally take?
a. 15 minutes b. 30 minutes c. 45 minutes d. One to two hours
You are assessing an unresponsive patient with a MedicAlert tag that indicates he is a diabetic. The patient's airway is patent, respirations are 20 per minute and adequate, radial pulse is rapid and weak, and the skin is warm and moist. You attempt to get a blood glucose reading, but your blood glucose monitor malfunctions. Which of the following is the best course of action?
A) Administer 25 g of 50 percent dextrose. B) Administer a 1 to 2 liter bolus of NS. C) Request another unit to respond to the scene with a blood glucose monitor. D) Request an order for 20 units of regular insulin.
These systems form a loop that serves all of the customers on the system
A. Loop, or belt, system B. Grid system C. Tree system