What is the primary mechanism by which ketamine exerts its rapid antidepressant effects in treatment-resistant depression?

A patient with bipolar disorder presents with acute mania. Which treatment approach would be most effective for rapid stabilization?

Match each dopamine pathway to the specific side effect experienced due to antipsychotic treatment:

Which characteristic is commonly associated with treatment-resistant depression?

Cognitive symptoms in schizophrenia, such as poor working memory and executive dysfunction, are thought to be related to dysregulation in which neurotransmitter system?

In the depressive phase of bipolar disorder, which neurotransmitter dysregulation is most likely contributing to symptoms of fatigue, lack of motivation, and anhedonia?

Match the aspect of HPA axis dysregulation with its impact on depressive symptoms.

15 Points A 10.0 kg block is released from point A as shown in the Diagram.  The track is frictionless except for the portion between points B and C, which has a length of 6.0 meters and a coefficient of friction μK = 0.36.  The block travels down the track and hits a spring with k = 2250 N/m What is the speed at point B? How much work is done by friction from point B and C? What is the speed of the block at point C? How much does the spring compress in bringing the block to rest?  

Which of the following is a common side effect of lithium that requires regular monitoring?

Match each mechanism of action to the expected clinical effect in the patient.