Which of the following is true related to oxygen diffusion?
a. It can only be perfusion limited
b. It is normally diffusion limited but under certain abnormal pulmonary condition can become perfusion limited
c. It can only be diffusion limited
d. It is normally perfusion limited but under certain abnormal pulmonary conditions can become diffusion limited
d. It is normally perfusion limited but under certain abnormal pulmonary conditions can become diffusion limited
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What cells release histamine when they recognize antigen-antibody complexes?
A) Mast cells B) Helper T cells C) Antigens D) Lymphocytes
Which statement is false regarding the vasoactivity of local anesthetic drugs?
A) All local anesthestic drugs are peripheral vasodilators. B) It is not a desired characteristic C) It affects both duration and efficacy D) Their vasoactivity decreases toxicity