Which Statement About the Blood-Brain Barrier Is True

question 138

Multiple Choice

Which statement about the blood-brain barrier is true?

• A) It is a part of the immune system that involves the release of antibodies to protect the brain from infectious agents.
• B) It is a property of the closely packed endothelial cells of the walls of brain capillaries that prevents large molecules from entering the brain.
• C) It is a property of the blood vessels of the brain that promotes the diffusion of nutrients into the tissue of the brain.
• D) It is a property of neurons that prevents them from accidentally releasing their neurotransmitters into the blood circulation.

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Definitions:

F-ratios

A statistical measure calculated by dividing the variance between groups by the variance within groups in the context of an ANOVA test.

F-ratio

A statistic used in ANOVA to compare the variance among group means to the variance within groups; it assesses whether the means are significantly different.

Variability

A statistical measure that indicates the extent to which data points in a dataset differ from the average value.

F-ratio

The ratio of variance between groups to the variance within groups in an ANOVA test, used to determine if there are any significant differences between group means.