Chapter 12- Musculoskeletal system

Question 1

What are the six types of synovial joints?

Answer 1

Ball-and-socket, Hinge, Pivot, Gliding, Saddle and condyloid

Question 2

What are ball-and-socket joints and give examples

Answer 2

• spherical head of bone fits into cup-like cavity of other bone
• allows full range of movement
• eg. humerus and scapula

Question 3

What are hinge joints and give examples

Answer 3

• one convex surface of bone fits on concave surface of other bone
• allows movement in only one plane
• eg. ulna and humerus

Question 4

What are pivot joints and give examples

Answer 4

• rounded end of bone fits to the ring of another bone
• allows only rotation movement
• eg. radius and ulna

Question 5

What are gliding joints and give examples

Answer 5

• allow movement in any direction in a side-to-side or back-and-forth motion
• restricted only by ligaments or bony processes surrounding
• eg. between carpal bones

Question 6

What are saddle joints and give examples

Answer 6

• both bones that fit are saddle-shaped(concave in one direction and convex in other)
• allows both side-to-side and back-and-forth motion
• eg. carpals and metacarpals

Question 7

What are condyloid joints and give examples

Answer 7

• one slightly convex bone fits other slightly concave bone
• allows movement in only two directions
• eg. metacarpals and phalanges

Question 8

What are the three types of joints?

Answer 8

Fibrous, cartilaginous and synovial