Which activity while driving accounts for an estimated 26 percent of all motor vehicle accidents?
a. swerving to miss an animal
b. tailgating
c. drinking a beverage
d. changing a radio station
e. using a cell phone
e
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A child who suffers from a persistent viral infection is found to have a deficiency in lymphocyte production and very few T and B cells
Other bone marrow-derived cells are produced in normal numbers, and MHC molecule expression on cells appears normal. Transfusion of mature T cells from an unrelated donor who had recovered from a previous infection by the same virus would not be expected to help the child clear his infection. Which one of the following is a reasonable explanation for why this therapeutic approach would fail? A. Viral infections are cleared by antibodies, not T cells. B. The patient's own immune system would destroy the transfused T cells before they could respond to the viral infection. C. T cells recognize peptides, not viral particles. D. Donor T cell viral antigen recognition is restricted by MHC molecules not expressed in the patient. E. In responding to the previous infection, the donor would have used up all his T cells specific for that virus.
The partially digested liquid mixture in the stomach is called:
A) chyme. B) rugae. C) ascites. D) antrum.
Seasonal affective disorder (SAD) is associated with
A) malfunction of the thyroid gland. B) a lack of social interaction. C) too much external stimuli. D) reduced exposure to sunlight.
Autogenics has been shown to benefit all of the following types of people EXCEPT ________.
A. people with multiple sclerosis B. migraine sufferers C. women with chest pain D. people with restless leg syndrome