Joints Chapter 8: Body Movements and Joint Classifications

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Questions and Answers

Which type of joint allows for limited movement with the bones farther apart than at a synarthrosis?

  • Synarthrosis
  • Synovial Joint
  • Amphiarthrosis (correct)
  • Diarthrosis

What distinguishes diarthroses from other joint classifications?

  • Presence of shock-absorbing cartilage
  • Lack of a joint capsule
  • Absence of direct bone contact (correct)
  • Bony edges close together

In which type of joint are the bony edges close together and may interlock?

  • Diarthrosis
  • Synarthrosis (correct)
  • Amphiarthrosis
  • Synovial Joint

What is the function of synovial fluid in a synovial joint?

<p>Reduces friction between the bones (B)</p> Signup and view all the answers

Which term describes movement in the anterior-posterior plane that decreases the angle between the bones?

<p>Flexion (D)</p> Signup and view all the answers

What term refers to moving a limb away from the longitudinal axis of the body's frontal plane?

<p>Abduction (C)</p> Signup and view all the answers

Which type of joint allows circumduction, a movement involving the limb moving in a circle?

<p>Diarthroses (D)</p> Signup and view all the answers

Hyperextension, a movement beyond normal limits, is typically prevented by which structures surrounding the joint?

<p>Tendons (B)</p> Signup and view all the answers

Which term describes rotating a limb inward towards the anterior surface?

<p>Medial rotation (D)</p> Signup and view all the answers

When the hand faces away from the frontal plane, it is in what position?

<p>Pronation (C)</p> Signup and view all the answers

Flashcards

Amphiarthrosis

A joint permitting limited movement; bones are farther apart compared to synarthrosis.

Diarthroses

Joints characterized by the absence of direct bone-to-bone contact.

Synarthrosis

A joint where bony edges are close together and may interlock, allowing very little or no movement.

Synovial Fluid Function

Reduces friction between bones in a synovial joint, allowing smoother movement.

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Flexion

Movement that decreases the angle between bones in the anterior-posterior plane.

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Abduction

Moving a limb away from the midline of the body in the frontal plane.

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Diarthroses

Joints that allow circumduction, where the limb moves in a circle.

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Tendons

Structures that commonly prevent hyperextension, movement beyond the normal limits.

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Medial Rotation

Rotating a limb inward, toward the anterior surface of the body.

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Pronation

Position of the hand when the palm faces away from the frontal plane.

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