Correct answer: In this case, the answer is option (C) Serotonin. Reason for correct statement: The best answer here is serotonin. While thinking about suicide is not abnormal in itself, attempting or completing the act of suicide is considered abnormal. Among the various factors implicated in suicide, genetic factors appear to play an important role in suicide, which typically runs in families. Studies have found a relationship between suicide and low levels of the neurotransmitter serotonin. People who attempt suicide and are found to have low serotonin levels are more likely to attempt suicide again than are those who attempt it and have higher serotonin levels. Reasons for incorrect statements: Option (A) refers to GABA. However, there is a low level of evidence in support of a dysfunction in the GABA system associated with suicide. So, option (a) is incorrect. Option (B) refers to norepinephrine. However, serotonin is the neurotransmitter that has been linked to a higher risk of suicide. So, option (b) is incorrect. Option (D) refers to oxytocin. However, serotonin is the neurotransmitter that has been connected to a higher risk of suicide. So, option (d) is incorrect. Therefore, the options (A), (B), and (D) are incorrect.

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Chapter 12.8, Problem 1SQ-P471

Summary Introduction

Correct answer: In this case, the answer is option (C) Serotonin.

Reason for correct statement: The best answer here is serotonin. While thinking about suicide is not abnormal in itself, attempting or completing the act of suicide is considered abnormal. Among the various factors implicated in suicide, genetic factors appear to play an important role in suicide, which typically runs in families. Studies have found a relationship between suicide and low levels of the neurotransmitter serotonin. People who attempt suicide and are found to have low serotonin levels are more likely to attempt suicide again than are those who attempt it and have higher serotonin levels.

Reasons for incorrect statements:

Option (A) refers to GABA. However, there is a low level of evidence in support of a dysfunction in the GABA system associated with suicide. So, option (a) is incorrect.

Option (B) refers to norepinephrine. However, serotonin is the neurotransmitter that has been linked to a higher risk of suicide. So, option (b) is incorrect.

Option (D) refers to oxytocin. However, serotonin is the neurotransmitter that has been connected to a higher risk of suicide. So, option (d) is incorrect.

Therefore, the options (A), (B), and (D) are incorrect.

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