Correlate blood vessel histology to vessel type and function in hemostasis
What will be an ideal response?
Answer: Tunica adventitia: thick outer layer of the blood vessels responsible for maintaining blood pressure; is thicker in veins than in arteries
Tunica media: middle layer responsible for vasoconstriction and vasodilation; is thicker in arteries than in veins
Tunica intima: has direct interaction with peripheral blood constituents; all three types of vessels (arteries, veins, and capillaries) in close tunica intima layers
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What is the purpose of Coordination of Benefits (COB)?
What will be an ideal response?
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.