Oxygen and carbon dioxide are exchanged in the lungs and through all cell membranes by ________.
A) osmosis
B) diffusion
C) filtration
D) active transport
B) diffusion
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Which is true regarding the mediated transport of a substance across a plasma membrane?
A. It always increases in direct proportion to the increasing concentration of the substance on one side of the membrane. B. Both "depends upon the binding of that substance to a specific site on the membrane protein" and "depends upon movement of proteins from one side of the membrane to the other" are correct. C. It depends upon movement of proteins from one side of the membrane to the other. D. It depends upon the binding of that substance to a specific site on the membrane protein. E. All of the choices are correct.
Which of the following bones is not part of the orbit of the skull?
A) Sphenoid B) Frontal C) Vomer D) Ethmoid
Generally, the higher the renal plasma clearance of a given drug, the more frequently the drug must be given in order to be effective.
Answer the following statement true (T) or false (F)
The epicardium is another name for the
A. myometrium. B. visceral layer of the serous pericardium. C. parietal layer of the serous pericardium. D. pericardium. E. myocardium.