What is chloride shift?
A. An exchange that maintains the ionic balance between the red blood cells and the plasma
B. Movement of chloride into cerebrospinal fluid, allowing its interaction with peripheral chemoreceptors
C. The type of reaction catalyzed by carbonic anhydrase
D. Movement of chloride across the respiratory membranes, decreasing oxygen delivery to tissues
Answer: A
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Answer the following statement true (T) or false (F)
The only kind of cell in the body that is not produced by the division of preexisting cells is
A) a gamete (sperm or egg cell). B) a neuron (nerve cell). C) an osteocyte (bone cell). D) none, because every cell is produced by the division of another cell. E) a liver cell.
Microtubules are strings of tubulin proteins that are formed from a
A) Dimer of ?-tubulin. B) Single string of ?-tubulin. C) Dimer of one ?-tubulin and one ?-tubulin. D) Hexamer of ?-tubulins and ?-tubulins twisted together.
A drug that blocked ________ channels would prevent neuron ________.
A. Na+; depolarization B. K+; depolarization C. Na+; hyperpolarization D. Ca2+; repolarization