Each of the following is a mechanisms responsible for moving lymph through lymphatic vessels, except ________.
a. thoracic pressure changes
b. mediastinum pressure changes
c. contraction of skeletal muscles
d. contraction of lymphatic vessels
Answer: b. mediastinum pressure changes
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Which of the following is true about Thiessen polygons?
A. The derivation of Thiessen polygons is based on a global method. B. Thiessen polygons do not vary in size. C. Thiessen polygons are smaller in areas with denser control points. D. The derivation of Thiessen polygons is based on a mathematical model.
Water soluble sulfur and nitrogen oxides produced by burning fossil fuels can be removed from an industrial source by ________
A) removing the sulfur and nitrogen before combustion of fuels B) wet scrubbers C) catalytic converters D) filtration E) planting large groves of trees nearby
The reduction of ________ waves at the core-mantle boundary indicates that the outer core is mostly liquid.
A. S B. Rayleigh C. Love D. P E. Rossby
What is a neutral pH?
a. 7 b. 1 c. 15 d. 0