Q:

Cerebrospinal fluid

0

 Cerebrospinal fluid


  1. Is an ultrafiltrate of plasma.
  2. Is the main source of the brain’s nutrition.
  3. Has the same pH as arterial blood.
  4. Has a higher glucose concentration than has plasma
  5. Has a higher calcium concentration than has plasma

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A. False  It is secreted actively by the choroid plexuses.

B. False  Brain nutrition is delivered mainly by cerebral blood flow.

C. False  It is around 7.3 compared with 7.4 in blood.

D. False  It is about two-thirds that of plasma.

E. False  About half; protein-bound calcium is negligible in CSF

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