Ventricular hypertrophy occurs when the heart must exert more effort to maintain normal cardiac output. Why is this greater effort needed?
A. Smaller chamber capacity in the atria
B. Abnormal electrical conduction through the heart
C. Increased peripheral vascular resistance
D. Extensive use of blood thinners such as Coumadin
Answer: C
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Each of the following statements regarding the principles of the paralleling technique is correct EXCEPT one. Which one is the EXCEPTION?
a. Parallel placement of the image receptor is accomplished using an image receptor holder. b. The central ray of the x-ray beam is directed perpendicular to both the teeth and the image receptor. c. The patient is directed to hold the image receptor in the mouth with a finger or thumb. d. The image receptor is placed parallel to the long axes of the teeth of interest.
Viruses are:
A) bacteria. B) ultramicroscopic. C) nonliving . D) both B and C.
Most of a physician's long-standing patients have a(n)
A. single-entry account. B. accounts payable account. C. open-book account. D. written-contract account.