Question 1

Which neurotransmitter appears to trigger a flood of unrelated thoughts, feelings, and perceptions, which may account for the voices, hallucinations, and delusions of schizophrenia?

Accepted Answer

The neurotransmitter that appears to trigger a flood of unrelated thoughts, feelings, and perceptions, which may account for the symptoms of schizophrenia, is dopamine.

Question 2

Antipsychotic drugs given to people with schizophrenia bind to the same receptor sites as a particular neurotransmitter and block its action.This reduction in this neurotransmitter's activity can quiet the person's agitation and psychotic symptoms.This neurotransmitter whose action is blocked is

Accepted Answer

The neurotransmitter whose action is blocked by antipsychotic drugs in people with schizophrenia is dopamine.

Question 3

The development of schizophrenia may involve stress altering the levels of which neurotransmitter that in turn alters the dopamine systems?

Accepted Answer

The neurotransmitter involved in the development of schizophrenia is glutamate. Stress can alter glutamate levels which in turn alters the dopamine systems in the brain, potentially leading to schizophrenia symptoms.

Question 4

MRI scans of the schizophrenic brain tend to show

Accepted Answer

MRI scans of the schizophrenic brain have consistently shown enlarged ventricles, which are fluid-filled spaces in the brain. This enlargement is thought to be a result of reduced brain tissue volume in other areas and is a common finding in schizophrenia.

Question 5

A researcher seeking an organic basis for schizophrenia would be well-advised to investigate the role of

Accepted Answer

Research has consistently shown that dopamine and glutamate play a major role in the development and symptoms of schizophrenia. High levels of dopamine activity in certain areas of the brain are associated with positive symptoms such as hallucinations and delusions, while low levels of glutamate activity in other brain regions are associated with negative symptoms such as apathy and social withdrawal. Therefore, investigating the roles of dopamine and glutamate could potentially provide insight into the organic basis of schizophrenia.

Question 6

Which neurotransmitter tends to influence brain activity in areas that control emotions and sensory information and may explain some of the symptoms seen in schizophrenia?

Accepted Answer

Glutamate is a neurotransmitter that is involved in controlling emotions and sensory information. Changes in glutamate levels in certain regions of the brain may explain some of the symptoms seen in schizophrenia. A) Acetylcholine is involved in muscle movement and memory. C) Melatonin is involved in regulating sleep. D) Schizotoxin is not a known neurotransmitter or chemical associated with schizophrenia.

Question 7

People with which disorder either have a high sensitivity to dopamine or have excess amounts of dopamine in their brains?

Accepted Answer

People with schizophrenia have been found to have excess dopamine activity in certain areas of their brains, which can contribute to their symptoms such as hallucinations and delusions.

Question 8

Which of the following is a computer-enhanced, three-dimensional representation of the brain that responds to the body's magnetic field and has allowed researchers to see the enlarged ventricles in the brains of persons with schizophrenia?

Accepted Answer

MRI (Magnetic Resonance Imaging) is a computer-enhanced, three-dimensional representation of the brain that responds to the body's magnetic field. It has been used to identify structural abnormalities in the brain, including enlarged ventricles in persons with schizophrenia. EEG (electroencephalogram) measures the electrical activity in the brain and is used to diagnose epilepsy and sleep disorders. MMPI (Minnesota Multiphasic Personality Inventory) is a standardized psychological test used to evaluate personality traits and psychopathology. GSR (galvanic skin response) measures changes in the electrical conductivity of the skin, which can be an indicator of emotional arousal.

Question 9

The CT scans and MRI scans both suggest that the brains of persons suffering from schizophrenia have

Accepted Answer

Both CT scans and MRI scans show that the brains of persons suffering from schizophrenia have shrunk (atrophied) in various regions. This has been associated with a loss of gray matter, particularly in the temporal and prefrontal cortices.

Question 10

Dopamine receptors in one part of the brain appear to become super-responsive to normal amounts of dopamine, which may account for which symptoms of schizophrenia?

Accepted Answer

The super-responsiveness of dopamine receptors in one part of the brain is specifically associated with the positive symptoms of schizophrenia such as hallucinations and delusions.

Question 11

Pronounced brain fissuring in young adults

Accepted Answer

Pronounced brain fissuring (also known as sulcation) in young adults may be a sign of neurological disorders such as schizophrenia or chronic alcoholism. It is not considered normal or common in individuals with high IQs, and it does not necessarily indicate a terminal illness.

Question 12

Which brain technique may become the tool of choice in accurately diagnosing schizophrenia in the future and involves the injection of a radioactive sugar solution and a measurement of how much sugar is used in each brain area?

Accepted Answer

PET scan or Positron Emission Tomography scan is the brain technique that involves the injection of a radioactive sugar solution and measures how much sugar is used in each brain area. This technique holds promise as a tool for accurately diagnosing schizophrenia in the future. It can help detect abnormalities in brain activity and metabolism, which are common in individuals with schizophrenia.

Question 13

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

Accepted Answer

The answer of CT scans and MRI scans both suggest...

Question 14

In most young adults with normal brains, the surface folds of the brain will

Accepted Answer

The answer of In most young adults with normal brains,...

Question 15

Research using PET scans on the schizophrenic brain reveal that their brains

Accepted Answer

Research using PET scans on the schizophrenic brain reveal that there is less activity in their frontal lobes. This is in contrast to the normal brains which have relatively high activity in this area.

Question 16

The CT scans of the brains of young individuals suffering from schizophrenia show their brains to have

Accepted Answer

CT scans of young individuals with schizophrenia often show wider than normal surface fissures, which is indicative of structural brain abnormalities associated with the disorder.

Question 17

People who take the hallucinogenic drug PCP have symptoms that closely mimic schizophrenia because PCP affects which of the following neurotransmitters in the brain?

Accepted Answer

PCP affects glutamate, which is a neurotransmitter involved in learning and memory. Disruptions in glutamate signaling have been linked to symptoms of schizophrenia.

Question 18

Brain researchers have found wider surface fissures, enlarged ventricles, and atrophy of the brain areas for regulating motivation, emotion, attention, actions, and perception in persons suffering from

Accepted Answer

Schizophrenia is a mental disorder that is characterized by a range of psychological symptoms including hallucinations, delusions, disordered thinking, and abnormal behavior. Brain researchers have found wider surface fissures, enlarged ventricles, and atrophy of the brain areas for regulating motivation, emotion, attention, actions, and perception in persons suffering from schizophrenia. These changes are thought to contribute to the development of symptoms associated with schizophrenia.

Question 19

Dopamine receptors in one part of the brain appear to become super-responsive to normal amounts of dopamine, triggering a flood of unrelated thoughts, feelings, and perceptions, which may account for the positive symptoms (voices, hallucinations, and delusions)of which disorder?

Accepted Answer

The description matches the positive symptoms of schizophrenia, such as hearing voices, seeing things that are not there, and holding false beliefs (delusions). PTSD, conversion disorder, and dissociative disorders do not typically exhibit these specific symptoms.

Question 20

The atrophy of brain areas in people with schizophrenia may be due to the

Accepted Answer

The answer of The atrophy of brain areas in people...

Quiz 14: Psychological Disorders.