The blood-brain barrier
a. limits the direct exchange of materials between the cerebrospinal fluid and brain
b. is formed in part by the tight junctions between the brain capillary cells
c. consists of the astrocyte processes that encircle the brain capillaries
d. exhibits all of the above
e. is formed entirely by the astrocytes that wrap around brain capillaries
B
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Indicate whether this statement is true or false.
The majority of the protein inside a red blood cell is
A) hemoglobin. B) albumin. C) fibrinogen. D) porphyrin. E) immunoglobulin.
Fibers that connect areas of the cerebral cortex within the same hemisphere are
A) projection fibers. B) commissural fibers. C) association fibers. D) all of the above.
________ is an autoimmune disorder in which the joint tissues are attacked by the patient's own immune system.
A. Rheumatoid arthritis B. Osteoporosis C. Osteoarthritis D. Osteomyelitis