A panic-prone person who ingests a(n) __________ would be expected to show increased anxiety.

A. benzodiazepine agonist
B. tricyclic antidepressant
C. MAO inhibitor
D. benzodiazepine antagonist

is it A

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To determine the correct answer, we need to understand the effects of each option on anxiety levels.

A. Benzodiazepine agonists: These drugs enhance the activity of a neurotransmitter called gamma-aminobutyric acid (GABA), which has a calming effect on the brain. Therefore, a panic-prone person ingesting a benzodiazepine agonist would likely experience decreased anxiety rather than increased anxiety. So, option A is not the correct answer.

B. Tricyclic antidepressants: These medications are primarily used to treat depression, but they can also have anxiolytic (anti-anxiety) effects. Therefore, a panic-prone person ingesting a tricyclic antidepressant might experience reduced anxiety levels rather than increased anxiety. So, option B is not the correct answer.

C. MAO inhibitors: These drugs are used to treat depression and anxiety, and they increase the levels of certain neurotransmitters in the brain. Although the effect on anxiety levels can vary, MAO inhibitors generally have an anxiolytic effect, which means they reduce anxiety. So, option C is also not the correct answer.

D. Benzodiazepine antagonists: These drugs block the effects of benzodiazepines, which are commonly used to reduce anxiety. By inhibiting the action of benzodiazepines, benzodiazepine antagonists can increase anxiety levels. Hence, a panic-prone person ingesting a benzodiazepine antagonist would be expected to show increased anxiety. Therefore, option D is the correct answer.

In conclusion, the correct answer is D.