The Blood-Brain Barrier

question 73

Multiple Choice

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) both (a) and (b) above.
• E) all of these answers.

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Definitions:

Tangible Gain

A clear and measurable benefit or advantage, often of a financial nature.

Utilitarianism

An ethical theory suggesting that the best action is the one that maximizes utility, usually defined as that which produces the greatest well-being of the greatest number of people.

Ethical Dilemmas

Ethical Dilemmas are situations in which a person has to choose between two options, neither of which resolves the situation in an ethically acceptable manner.

Clear-Cut

Something that is easily understood or determined; unambiguous and straightforward.