The Presence of a Barrier Between the Bloodstream and the Brain

question 108

Multiple Choice

The presence of a barrier between the bloodstream and the brain is suggested by the observation that

• A) all cells of the body are stained by a dye injected into the bloodstream.
• B) injection of dye into the bloodstream stains all cells but those of the brain and spinal cord.
• C) the gut is stained by a dye injected into the brain ventricles.
• D) injection of dye into the spinal cord stains the cells of the gut.
• E) injection of dye into the gut stains the cells of the spinal cord.

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Definitions:

Item

A distinct piece or unit of data, or an object in programming and inventory management.

Element's Position

The specific location or index of an item within a data structure, such as an array or list.

Array Name

An array name in programming serves as a reference to the location of the first element in the array, which can be used to access other elements through indexing.

First Element

The initial item or component in an array, list, or other data structure, often located at index 0 in zero-based indexing systems.