Chapter 9 Check Your Recall

Multiaxial

Allow motion in multiple planes

Uniaxial

Allow motion in one plane

Biaxial

Allow motion in two planes

d. joint that allows some motion.

An amphiarthroses is defined as a a. joint that allows no motion. b. joint that is freely moveable. c. joint with multiple axes of motion. d. joint that allows some motion.

Flexion

Decreasing the angle between two bones

Nonaxial

Does not move around an axis

Extension

Increasing the angle between two bones

Rotation

Movement around a central axis

Circumduction

Movement in a circle

Abduction

Movement of a body part away from the midline

Adduction

Movement of a body part toward the midline

Dorsiflexion

Movement of the ankle that decreases the angle between the foot and leg

b. joint capsule; synovial fluid

Synovial joints are surrounded by a/an ________________ and filled with _______________. a. articular disc; serous fluid b. joint capsule; synovial fluid c. articular cartilage; serous fluid d. articular disc; synovial fluid

b. provide stability between two bones.

The main function of a fibrous joint is to a. allow motion to occur between two bones. b. provide stability between two bones. c. unite two bones with cartilage. d. allow some motion while still providing stability between two bones. e. unite two bones with a synovial cavity

False; Articular cartilage

True or False: Articular discs provide a smooth, nearly frictionless surface for articulation.

False; Articular discs

True or False: Bursae improve the fit between two bones in a synovial joint.

False; bursae

True or False: Fluid-filled sacs called ligaments often lie between tendons and the joint capsule of a synovial joint.

True

True or False: The articulating ends of the bones in a synovial joint are covered by articular cartilage.

False; joint capsule

True or False: The tendon sheath of a synovial joint is lined with a synovial membrane.

Pronation

Turning the palm over to face down

b. One bone rotates around another bone.

Which of the following correctly describes a pivot joint? a. The convex articular surface of one bone fits into a concave articular surface of another bone. b. One bone rotates around another bone. c. The flat articular surfaces of two bones glide past one another. d. The rounded, ball-like end of one bone fits into a concave depression of another bone.

a. The convex articular surface of one bone fits into a concave articular surface of another bone.

Which of the following describes a hinge joint correctly? a. The convex articular surface of one bone fits into a concave articular surface of another bone. b. One bone rotates around another bone. c. The flat articular surfaces of two bones glide past one another. d. The rounded, ball-like end of one bone fits into a concave depression of another bone.