CT Scans and MRI Scans Both Suggest That the Brains

question 455

Multiple Choice

CT scans and MRI scans both suggest that the brains of schizophrenics have shrunk, which may be due to the schizophrenic brain

• A)becoming more densely packed with aging.
• B)developing plaques and tangles.
• C)having abnormal brain chemicals that accumulate and cause neuronal death.
• D)being unable to continually create new neurons to replace old ones that have died.

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Definitions:

Van der Waals Interaction

A weak force of attraction between molecules or parts of molecules that results from transient fluctuating electrical charges.

Hydrogen Bond

A weak chemical bond formed between the hydrogen atom of one molecule and an electronegative atom (often oxygen or nitrogen) of another molecule.

Ionic Bond

A chemical bond formed between two ions with opposite charges through the transfer of one or more electrons from one atom to the other.

Specific Heat

The amount of heat per unit mass required to raise the temperature of a substance by one degree Celsius, a property that varies among different substances.