The Blood-Cerebrospinal Fluid Barrier

question 16

Multiple Choice

The blood-cerebrospinal fluid barrier

• A) is the same thing as the blood-brain barrier.
• B) is due mainly to tight junctions between endothelial cells of the capillaries throughout the brain tissue.
• C) protects the neurons of the brain and spinal cord from potentially harmful substances in the blood.
• D) is another name for cranial meninges.

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Definitions:

Population Variances

A measure of the variance within an entire population, indicating the average of the squared differences from the mean.

Test Statistic

A standardized value calculated from sample data during a hypothesis test; used to decide whether to reject the null hypothesis.

Confidence Interval

A variety of values taken from statistics of a sample, presumed to hold the value of a not yet known population attribute.

Equality of Means

A statistical hypothesis test to determine whether there is a significant difference between the means of two or more groups.