Joint Structure and Function

Question 1

What are the 3 structural joint classifications and respective examples?

Answer 1

1) Fibrous: Teeth, sutures in skull
2) Cartilaginous: Costal Cartilage/IV Discs
3) Synovial: Hip Joint

Question 2

How are joints functionally classified?

Answer 2

Based on amount of movement at a joint

Question 3

What are the 3 functional classifications of a joint?

Answer 3

1) Synarthroses: Immovable
2) Amphiarthroses: Slight movement
3) Diarthroses: Freely moveable

Question 4

What are the 5 main features of a synovial joint?

Answer 4

1) Articular Cartilage: Hyaline
2) Joint capsule
3) Joint cavity
4) Synovial Fluid
5) Reinforcing Ligament

Question 5

What are bursae and menisci?

Answer 5

Bursae: Fluid filled sacs lined by synovial membrane
Menisci: Discs of Fibrocartilage

Question 6

What role does hyaline cartilage have in a synovial joint?

Answer 6

Frictionless surface, acting to resist compressive loads

Question 7

What is found in hyaline cartilage?

Answer 7

1) High water content
2) Low cell content
3) No blood supply

Question 8

What is function of synovial fluid

Answer 8

Lubrication of joint by covering articulating surface, so reduces friction

Question 9

What are the 5 classes of synovial joint?

Answer 9

1) Saddle
2) Pivot
3) Ball and Socket
4) Gliding e.g. Carpals
5) Hinge e.g. Elbow