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Muscle Pairs and Movement

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Questions and Answers

What is the main function of facial muscles?

To contract and pull bones (correct)

To straighten joints

To bend joints

To push bones

Why do skeletal muscles come in pairs?

To contract simultaneously

To always pull in one direction (correct)

To allow for bending of joints

To push bones in different directions

How do muscle pairs work when moving a joint?

Both muscles contract simultaneously

One muscle pulls while the other relaxes (correct)

Both muscles relax simultaneously

One muscle pushes while the other pulls

What happens when one muscle in a pair contracts to bend a joint?

Its partner muscle contracts and pulls in the opposite direction Signup and view all the answers

Which type of connective tissue anchors some facial muscles to bones?

Tendons Signup and view all the answers

How does the complex system of facial muscles allow for facial expressions?

By moving the skin slightly with muscle contraction Signup and view all the answers

What causes wrinkles as described in the text?

Degeneration of collagen Signup and view all the answers

Which facial feature is typically affected first by aging with 'crow's feet'?

Corners of the eyes Signup and view all the answers

What is the primary role of elastin in young skin?

Enabling easy stretching and shrinking Signup and view all the answers

Which of the following emotions can a 'smile' NOT always indicate according to the text?

Sarcasm Signup and view all the answers

What effect does the degeneration of elastin have on facial skin?

Leads to less flexibility in skin movement Signup and view all the answers

Which region of the face, besides the mouth, plays a significant role in conveying emotions through expressions?

Eyes Signup and view all the answers