The glial cell that helps to form the blood-brain barrier is the

A.  astrocyte.
B.  ependymal cell.
C.  neurolemmocyte.
D.  microglial cell.
E.  oligodendrocyte.


A

Anatomy & Physiology

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Normal pH for blood is 7.35 to 7.45. Maintenance of the pH in this range is

A. not critical because extreme pH values do not affect enzyme function. B. not required. C. critical because enzymes work best within narrow ranges of pH. D. called denaturation. E. None of the choices are correct.

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Infant respiratory distress syndrome occurs because premature infants lack the ability to produce _______, which _______.

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Answer the following statement true (T) or false (F)

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