Exam 5: Catecholamines

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Hypertension and _______ can be treated with β-receptor antagonists.

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D

Describe restless legs syndrome. Which dopamine receptor has been used to treat this syndrome?

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The primary symptom of restless legs syndrome is a strong and uncomfortable urge to move one's legs. The sensation usually occurs at night or after the legs have been still for period of time, such as on a long car ride. Other symptoms are itching, numbness, tingling, burning, pain, and cramps. The cause of the syndrome is unknown, although abnormal functioning of the dopaminergic system has been implicated. Treatment with the medications pramipexole, ropinirole, or rotigatine, which activate D3 receptors has reduced symptoms in people affected by this disorder.

Catecholamine levels can be decreased by _______, which serves to _______.

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C

High levels of MHPG, HVA, and VMA in the blood and urine can indicate

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The D2/D3 receptor agonist bromocriptine (Cycloset), is used to treat type 2 diabetes by regulating blood insulin and glucose levels. The mechanism of action of this drug is thought to be _______ nervous system resulting in reduced glucose production.

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A _______ receptor antagonist, which is thought to block DA receptors in the limbic system, would likely be prescribed to a patient with schizophrenia.

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Signs of opioid withdrawal include increased heart rate, diarrhea, and elevated blood pressure, which can be relieved by stimulating

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6-hydroxydopamine (6-OHDA) is a(n) _______ used to _______.

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Why are adrenergic agonists and antagonists important in the treatment of many nonpsychiatric medical conditions?

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Which symptom would not be expected in an animal treated bilaterally with 6-OHDA?

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A scientist investigating a newly identified receptor in rat cortex determines that it is a metabotropic receptor that regulates membrane-bound K+ channels in some cells and inhibits adenylyl cyclase. Based on these findings, the receptor is most likely a(n)

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A group of mice is given reserpine as part of an experiment. Behaviorally, these animals would be expected to show

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Describe the evidence linking wakefulness to orexin and NE in the lateral hypothalamus.

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Write a coherent and informative paragraph incorporating the following terms: phasic release, extracellular DA, tonic release, burst mode, VTA.

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β\beta 1- and β\beta 2-adrenoceptors _______, whereas ?2-receptors _______.

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The main reason for administering albuterol via inhaler is that it

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You are crossing a busy street and carefully look both ways for oncoming traffic. As soon as you step into the street someone near you pulls you back as you suddenly notice a car approaching. Your heart is pounding and you suddenly feel sweaty. Which brain structure plays a key role in your response to this upsetting event and subsequent memory of it?

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Norepinephrine produced in cell bodies in the sympathetic chain ganglia

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Once synthesis has occurred, a protein called the _______ is responsible for packaging molecules of dopamine into membrane packets for release.

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Describe the steps involved in the synthesis and metabolism of the catecholamines, including all the enzymes involved.

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