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If muscles are only capable of contracting and relaxing, how is it we can stick out our tongues?

My instructor is asking yet another difficult question....lol

2006-10-03 16:13:08 · 1 answers · asked by ladylew07 2 in Health ➔ Other - Health

1 answers

You have 2 sets of muscles for everything. Think how it would be if you didn't. You could bend your arm, but couldn't straighten it out.

2006-10-03 16:18:32 · answer #1 · answered by eferrell01 7 · 0⤊ 0⤋

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