In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.
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Question: Question: A potential receiver: 
 Options:  <0> It is produced by the opening of voltage-dependent channels. <1> Increase its frequency if the intensity of the stimulus increases. <2> It occurs after the binding of the neurotransmitter to the postsynaptic receptor. <3> They occur if the trigger threshold is exceeded. <4> It can be exciter or inhibitor.

Answer: biology


Question: Question: E. H. is a 64-year-old lady diagnosed with hypertension and assisted by her nurse in the corresponding program. The activities carried out by the nurse are aimed at regulating the exercise and development of the self-care agency of E. H. The lady performs her self-care and regulates the exercise and development of her self-care agency. This organization of care is described by Orem as a system: 
 Options:  <0> Partially compensatory. <1> Support-education. <2> Completely compensatory. <3> Complementation <4> Of shared regulation and development.

Answer: nursery


Question: Question: The three-dimensional arrangement of a protein corresponds to: 
 Options:  <0> Its primary structure <1> Its secondary structure. <2> Its tertiary structure. <3> Its quaternary structure. <4> With its primary, secondary, tertiary and quaternary structure.

Answer:
chemistry