What is Positron Emission Tomography?
What will be an ideal response?
If certain radiopharmaceuticals are administered to patients, they behave in different ways in different body organs. In the case of Positron Emission Tomography (PET) scans, a positron-emitting radiopharmaceutical emits gamma rays, which can be reconstructed by the PET scanner into a three-dimensional image of tracer concentration, thereby providing highly detailed imaging of internal body structures. PET scanners are large and complex, filling one or more rooms.
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A 2-month-old infant has a three-day history of diarrhea and vomiting. This should cause a high suspicion for:
A) fever. B) infection. C) croup. D) shock.
While listening to an otherwise healthy elderly patient's lungs, you note decreased breath sounds. Which of the following may explain this finding?
A) Previous abdominal injuries B) Decreased lung capacity C) Increased chest wall flexibility D) Decreased blood flow to the lungs
The steps, or rungs, of the DNA ladder-like structure consist of complementary chemicals that are
a. acetic acids. b. fatty acids. c. pairs of nitrogenous bases. d. sugar–phosphate compounds.
If a gland secretes its product into a duct, such as with a sweat or oil (sebaceous) gland, it is called a(n) _______________ gland.
Fill in the blank(s) with the appropriate word(s).