12 Questions
What is the main function of facial muscles?
To contract and pull bones
Why do skeletal muscles come in pairs?
To always pull in one direction
How do muscle pairs work when moving a joint?
One muscle pulls while the other relaxes
What happens when one muscle in a pair contracts to bend a joint?
Its partner muscle contracts and pulls in the opposite direction
Which type of connective tissue anchors some facial muscles to bones?
Tendons
How does the complex system of facial muscles allow for facial expressions?
By moving the skin slightly with muscle contraction
What causes wrinkles as described in the text?
Degeneration of collagen
Which facial feature is typically affected first by aging with 'crow's feet'?
Corners of the eyes
What is the primary role of elastin in young skin?
Enabling easy stretching and shrinking
Which of the following emotions can a 'smile' NOT always indicate according to the text?
Sarcasm
What effect does the degeneration of elastin have on facial skin?
Leads to less flexibility in skin movement
Which region of the face, besides the mouth, plays a significant role in conveying emotions through expressions?
Eyes
Learn about how muscles work in pairs to facilitate movement in the body. Understand the concept of muscles contracting and relaxing to allow for joint movement in opposite directions.
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