10. Muscles

Muscle Actions

Multiple Choice
Which muscle contracts to extend the elbow?
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Multiple Choice
Which muscle contracts to flex the elbow?
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Multiple Choice
Which muscle is the prime mover (agonist) of dorsiflexion at the ankle?
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Multiple Choice
Which term describes a muscle that relaxes while its agonist contracts during movement?
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Multiple Choice
Which statement best describes the action of the zygomaticus major muscle?
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Multiple Choice
A muscle that opposes, or reverses, a particular movement is called a(n):
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Multiple Choice
Which facial muscle is primarily used to produce a grin by retracting the corners of the mouth?
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Multiple Choice
The biceps brachii and brachialis both perform which of the following actions?
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Multiple Choice
The genioglossus is the primary muscle involved sticking out your tongue. The styloglossus is responsible for pulling the tongue back in, making it a(n) _______ for sticking out your tongue?
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Multiple Choice
Which facial muscle is primarily responsible for producing horizontal wrinkles across the forehead when it contracts?
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Multiple Choice
Which facial muscle action is primarily responsible for frowning by pulling the eyebrows inferiorly and medially?
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Multiple Choice
Which term describes the site where a muscle attaches to a stationary bone?
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Multiple Choice
Which muscle elevates the eyebrows?
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Multiple Choice
Which muscle is not involved in plantar flexing the foot?
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Multiple Choice
Which term describes the ability of muscles to work against resistance?
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