1-61Which of the Following Statements About Brain Dysfunction and Psychiatric

question 36

Multiple Choice

1-61.Which of the following statements about brain dysfunction and psychiatric disorders is correct?

• A)Identifiable brain damage is often the cause of psychiatric disorders.
• B)Brain damage may decrease the risk of developing a psychiatric condition.
• C)Changes in brain function appear to play a role in many psychiatric disorders.
• D)Brain development can be altered by experience,always leading to changes in the brain that decrease the risk of developing a psychiatric condition.

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Definitions:

Excitation Threshold

The voltage difference between a neuron’s interior and exterior that, if exceeded, causes the neuron to fire.

Action Potential

A temporary reversal of electric polarization of the membrane of a nerve cell or muscle cell, involved in the transmission of signals.

Nodes of Ranvier

Gaps in the myelin sheath of nerve fibers that facilitate the rapid conduction of electrical impulses along the neuron.

Myelinated Neuron

A nerve cell that features a myelin sheath around its axon, enhancing the speed of electrical transmission of signals.