Which of the following is not an activity associated with secretory IgA and secretory IgM in mucosal secretions?
a. toxin neutralization
b. complement fixation
c. binds to mucin through disulfide bonds
d. restricts commensal microorganisms to gut lumen
e. limits population size of commensal microorganisms.
B
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A 62-year-old man known to have a duodenal ulcer developed diffuse abdominal pain. The anterior abdominal wall was tender on palpation. X-ray examination revealed air under the diaphragm
Which of the well-known complications of peptic ulcer accounts for this clinical finding? A. penetration into the pancreas B. perforation of the ulcer C. stenosis of the duodenum D. hemorrhage E. melena
Which of the following terms means containing fat?
A. Collagen B. Adipose C. Cellulite D. Lipase E. Lipoma
In the presynaptic terminal of neuronal cells, the immediate trigger to release a neurotransmitter from synaptic vesicles into the synaptic cleft is
A) a drop in cytosolic Ca2+. B) a drop in cytosolic K+. C) a rise in cytosolic Ca2+. D) a drop in cytosolic Mg2+. E) a rise in cytosolic K+. F) a rise in cytosolic Mg2+.
Cutane/o: __________
Fill in the blank(s) with correct word