autoimmune diseases a class of diseases, including rheumatoid arthritis and multiple sclerosis, that are characterized by a disruption of the chemical communication system that regulates the immune system, instead of attacking antigens, the immune system attacks healthy tissues of the body and causes inflammation or deterioration
Which of the following is the recommended size of the beam at the patients face?a. 2.75 inchesb. 3.25 inchesc. 3.50 inchesd. 4.00 inches
A fixing agent found in the fixer isa. potassium alumb. acetic acidc. sodium thiosulfate
any leaks of white light into the darkroom will causea. film fogb. film reticulationc. overdeveloped filmsd. underexposed films
The following must be disclosed to the patient prior to obtaining informed consenta. the purpose of the procedure and who will perform itb. the potential benefits of receiving the procedurec. the possible risks involved in having the procedure performed, including the risk of not having the procedure performedd. all the above
which of the following represents how soon radiation dissipates in a treatment room following a 5 impulse exposure?a. immediatelyb. within 5 secondsc. within 30 secondsd. within 2 minutese. never totally
If kilovoltage is decreased with no other variations in exposure factors, the resultant film willa. appear lighterb. appear darkerc. remain the samed. either a or b
The overall blackness of a film is termeda. contrastb. densityc. overexposured. polychromatic
Identify which of the following is true concerning labial mountinga. the patients left is on your leftb. the patients left is on your rightc. the teeth are mounted in reverse anatomic orderd. the radiographs are viewed as if the operator were inside the patients mouth looking out
Ionization occursa. when atoms lose electrons; they become deficient in negative charges and therefore behave as positively charged atoms.b. when atoms gain electrons; they become positively chargedc. when an atom loses its nucleusd. only whn K-orbit electron is ejected and replaced by an L-orbit
Greater beam limitation is achived when the PID is ________ and the diameter of the opening is __________.a. shorter; smallerb. longer; biggerc. shorter; biggerd. longer; smaller
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