Word for prayer responses

I'm trying to find a word for the responses which people utter during prayer recitals or general "praise the lord" sort of speeches (not in sermons). Let me try elucidating this via an example:

Priest: "blah blah blah"
Random Person: "amen"
Priest: "blah blah blah"
Random Person: "ooo, praise the lord"
Priest: "blah blah blah"
Random Person: some random quote praising the lord

The best example would be the stuff you see in movies, typically portrayed in African-American churches. I'm sure there's a word for it. Also, forgive me if the meaning is not clear.

Solution 1:

As far as I know, this pattern is called call and response.

Solution 2:

I am pretty sure the word is simply "response". I have seen in prayer books:

Congregation responds: "Amen"

Solution 3:

These might be 'ejaculations' (sniggering down in back, please). Here is the catholic culture org explanation: http://www.catholicculture.org/culture/library/dictionary/index.cfm?id=33288

I recall them being explained as something like your random persons in the example might say, though at any time, not in a 'call and response' setting.

For instance, Wikipedia has this: http://en.wikipedia.org/wiki/Ejaculation_(grammar)