Which of the following statements is correct

Options

A. Some tranquilizers function by inhibiting the enzymes which catalyse the degradation of noradrenaline
B. Tranquilizers are narcotic drugs
C. Tranquilizers are chemical compounds that do not affect the message transfer from nerve to receptor
D. Tranquilizers are chemical compounds that can relieve pain and fever

Answer

A

Explanation

Tranquilizers are used for the treatment of stress, fatigue, mild and severe mental diseases. They relieve anxiety, stress, irritability or excitement by inducing a sense of well-being. Noradrenaline is one of the several neurotransmitters which play an important role in mood changes.
If the level of noradrenaline in the body is low for some reasons, then the message transfer process becomes slow and the person suffers from depression. In such cases, antidepressant drugs are used. These drugs inhibit the enzymes which catalyse the degradation of noradrenaline.
If the enzyme is inhibited, then the neurotransmitter noradrenaline is slowly metabolised and can thus activate the receptor for longer periods there by counteracting the effect of depression. Tranquilizers form an essential component of sleeping pills.