A major limitation of radiographs is that they
A. can only visualize bone.
B. give only a flat, two-dimensional image of the body.
C. are old technology that do not give good results.
D. have very few applications.
B
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Vitamin B12 is important for the production of red blood cells because it is utilized in the synthesis of intrinsic factor.
Answer the following statement true (T) or false (F)
Despite its apparent durability, the dermis is subject to tearing. How might a person know that the dermis has been stretched and/or torn?
A) The pain is acute due to the large number of Meissner's corpuscles. B) The appearance of visible, silvery-white scars is an indication of stretching of the dermis. C) The blood vessels in the dermis rupture and the blood passes through the tissue, causing "black-and-blue marks." D) The stretching causes the tension lines to disappear.
What do tissue macrophages develop from?
A. Monocytes B. Polymorphonuclear leukocytes C. Lymphocytes D. Neutrophils E. Basophils
The ________ are sites of protein synthesis within cells.
A. ribosomes B. nucleoli C. vesicles D. lysosomes