The abbreviation for a soft, very heavy metal used for shielding against x-rays is:
A) R.
B) Ba.
C) Ra.
D) Pb.
D
Explanation:
A) The abbreviation R stands for roentgen.
B) Ba stands for barium.
C) Ra stands for radium.
D) Correct.
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Which of the following is an example of antagonism?
A. IL-2 stimulates B-cell proliferation so that antibodies are produced. B. IL-4 causes B cells to differentiate into plasma and memory cells. C. IL-4 and IL-5 cause class switching of immunoglobulins secreted by plasma cells. D. IFN-? prevents class switching in plasma cells by binding IL-4. E. IL-12 stimulates activation of TH cells.
Apoptosis is
A. similar to necrosis. B. important in peripheral tolerance, but not central tolerance. C. important in central tolerance, but not peripheral tolerance. D. impaired in Fas-deficient systems. E. None of the above.
Which of the following is a less severe side effects associated with antipsychotic drugs?
A. Constipation B. Dry mouth C. Altered skin pigmentation D. All of these are correct
The muscles of the wrist and hand are all innervated from the radial and median nerves of the brachial plexus.
Answer the following statement true (T) or false (F)