A 19-year-old man with a significant seizure history has various seizures including partial onset seizures, myoclonic seizures, and, occasionally, primary generalized tonic-clonic seizures. His physician prescribed levetiracetam. This agent likely works on which of the following structures?

A 19-year-old man with a significant seizure history has various seizures including partial onset seizures, myoclonic seizures, and, occasionally, primary generalized tonic-clonic seizures. His physician prescribed levetiracetam. This agent likely works on which of the following structures?

Regarding differences between the sympathetic and parasympathetic nervous systems in a healthy 29-year-old graduate student athlete, which of the following is a feature of the sympathetic nervous system?

Which of the following changes occur at the neurotransmitter/synaptic space when an excitatory postsynaptic potential is generated?

A 19-year-old man is brought to the emergency department after being found by his roommate to have snorted cocaine several times in the past few days, the last time being 10 h previously. He was given a drug that sedated him, and he fell asleep. The drug that was used to counter this patient's apparent cocaine withdrawal was very likely which of the following?

A 62-year-old woman with symptoms of feeling blue, sad, and without feelings presents to her primary care physician for treatment. She has a prior medical history of narrow-angle glaucoma. Which of the following treatments should be avoided in this patient?