Which of the Following Describes the Blood-Brain Barrier

question 47

Multiple Choice

Which of the following describes the blood-brain barrier?

• A) It is fully developed in humans at birth.
• B) It is malleable in order to permit drug compounds into the brain
• C) It cannot be penetrated, even with trauma to the brain
• D) It prevents many drugs from entering the brain

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Definitions:

Population Mean

The population mean is the average value of a population attribute, computed by summing all the values in the population and dividing by the total number of values.

Sample Proportion

The ratio of members in a sample that have a particular characteristic to the total number of members in the sample.

Standard Error

The standard deviation of the sampling distribution of a statistic, especially of the mean.

Sample Mean

The average value calculated from a sample of observations from a larger population.