A patient with severe asthma gets no relief from antihistamines. The symptoms are MOST likely to be caused by:
a. interleukin-2
b. slow-reacting substance A (leukotrienes)
c. serotonin
d. bradykinin
b. slow-reacting substance A (leukotrienes)
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Cytokine treatment of cancer has proven problematic because
A. cytokines can show in vivo toxicity. B. dosages are very hard to control properly. C. cytokines can regulate the production of other cytokines. D. cytokines exert effects on a large number of target cells. E. All of the above.
All of the following are basic, natural laws except:
(a) all systems in nature are connected to every other system (b) creating natural resources is necessary for the future of mankind (c) matter is never destroyed, it is recycled (d) nature's capacity to absorb human by products is limited
Drooping of the upper eyelids is called:
A) blepharitis. B) blepharoptosis. C) chalazion. D) conjunctivitis.
It's difficult to find or make effective cleaning products with natural ingredients that are less likely to produce allergy symptoms or trigger asthma attacks
Indicate whether the statement is true or false