The Presence of a Barrier Between the Blood Stream and the Brain

question 93

Multiple Choice

The presence of a barrier between the blood stream 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 ventricles stains all cells of the body.
• E) most chemicals rapidly reach the brain after oral ingestion..

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Definitions:

Delusions

Fixed false beliefs that are resistant to reason or confrontation with actual fact, typically observed in psychiatric conditions.

Hallucinations

Perception-like experiences that occur without an external stimulus, vivid and clear, with the full force and impact of actual perceptions, and not under voluntary control.

Psychotic Disorders

A category of mental health conditions that affect a person's sense of reality, often including symptoms like delusions and hallucinations.

Mental Health

A state of well-being in which an individual realizes their own abilities, can cope with the normal stresses of life, can work productively, and is able to make contributions to their community.