Dopaminergic receptors, although not fully understood, are believed to cause:
a. dilation of the renal, coronary, and cerebral arteries.
b. constriction of peripheral arteries.
c. an increase in respirations and blood flow to the respiratory system.
d. constriction of the hepatic arteries.
a
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Which of the following oral lesions is associated with secondary syphilis?
a. Herpetiform ulceration b. Notched incisors c. Gumma d. Hairy tongue e. Mucous patch
During the process of coherent scattering, an incident low-energy x-ray photon interacts with
a. a single inner-shell electron, ejecting it from its orbit. b. a single outer-shell electron, ejecting it from its orbit. c. an atom and may transfer its energy by causing some or all of the electrons of the atom to momentarily vibrate and radiate energy in the form of electromagnetic waves. d. a scattered photon of lesser energy, annihilating it.
Who can write orders for care of the patient?
A. Physician B. Laboratory attendant C. Nurse D. Radiology tech
An accurately positioned AP knee projection demonstrates all the following except the
a. medial and lateral femoral epicondyles in profile. b. fibular head 1 inch (2.5 cm) distal to the tibial plateau. c. superimposed tibial condylar margins. d. the intercondylar eminence in the center of the intercondylar fossa.