Collocations for respond to - phr verb

Respond to is used with these nouns as the subject:
patient

Respond to is used with these nouns as the object:
ad, advert, advertisement, call, challenge, complaint, crisis, critic, criticism, demand, emergency, enquiry, greeting, letter, need, overture, pressure, provocation, query, question, questionnaire, request, signal, situation, stimulation, stimulus, summons, survey, treatment