Arrange the steps of an allergic response in the proper order
1) Allergic symptoms appear.
2) Allergen binds with IgE.
3) IgE combines with mast cell receptors.
4) Mast cells release histamine.
5) Plasma cells sensitized.
a. 5, 3, 2, 4, 1
b. 1, 5, 2, 4, 3
c. 5, 2, 4, 3, 1
d. 1, 4, 5, 2, 3
e. 4, 5, 2, 3, 1
A
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Answer the following statements true (T) or false (F)
1. CSF specimens should be refrigerated en route to the Clinical Microbiology Laboratory. 2. There is no need to refrigerate urine specimens for culture if they are clean-catch midstream specimens. 3. Many clinical specimens labeled “sputum” are actually saliva specimens. 4. The Clinical Microbiology Laboratory is part of the Clinical Pathology Division of the Pathology Department. 5. ?-Lactamase testing is always performed on isolates of Neisseria gonorrhoeae and Haemophilus influenzae.
A European robin detects directional differences in the earth's magnetic field through cryptochromes found in its _____.
A. forebrain B. eyes C. nose D. ears E. heart
Why can some plants be cloned from a single cell?
A) Plant cells do not differentiate even when mature, so any cell can grow into an entire plant. B) Plant cells can dedifferentiate and give rise to all of the specialized cells required to produce an entire plant. C) Plant cells can produce genes to replace those lost during development. D) Plant cells are capable of self-renewal by utilizing cellular components from adjacent cells.
Actinomyces israelii
A. can be transmitted by respiratory droplets. B. can cause pneumonia with symptoms similar to tuberculosis. C. are filamentous rods that grow in clusters called sulfur granules in infected tissue. D. lives in the soil. E. causes most cases in the immunocompromised.