Who wants to take this? — The person running the meeting asks for one name.
I’ll take that. — The task is mine.
Put me down for that. — Write my name next to this task.
I can take a first pass. — I will produce the first version, and the others can comment on it.
Leave it with me. — You do not need to think about it again. I will handle it.
Consider it done. — I accept the task, and you can count on it.