In this task, You are given an open-domain question that can be answered based on factual information. Your task is to provide \*short\* answer (in a few words only) for the given question. The short answer can be one or more entities or it can also be boolean \*yes\* or \*no\*.
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Question: what are four functions of the cell or plasma membrane

Answer: controls the movement of substances


Question: who wrote the song love is a rose

Answer: Neil Young


Question: what is it called when you have sudden mood changes

Answer:
A mood swing