Ch 8 Articulations

Question 1

Functional classification of joints

Answer 1

Amount of movement a joint allows

Question 2

Structural Classification

Answer 2

Based on two anatomical features

1. Type of connective tissue that links them
2. Presence or absence of space between articulating bones

Question 3

Fibrous Joints

Answer 3

Dense regular collagenous connective tissue
No joint space
Synarthrosis or Amphiarthrosis

Question 4

Cartilaginous Joints

Answer 4

Cartilage between adjoining bones
No joint space
Synarthrosis or amphiarthrosis

Question 5

Synovial joints

Answer 5

Layer of hyaline cartilage on surface of each articulating bone
Only class that has a joint space ( cavity)
Had other supporting structures which surround the bones and enclose the joint cavity

Question 6

Synarthrosis

Answer 6

Does not allow any movement

Question 7

Amphiarthrosis

Answer 7

Allows small amount of movement

Question 8

Diarthrosis

Answer 8

Freely moveable

Question 9

Three types of fibrous joints

Answer 9

Sutures ( skull)
Gomphoses( immovable joint between tooth and alveolus)
Syndesmoses ( ligaments such as those between tibia and fibula)

Question 10

2 types of Cartilaginous Joints

Answer 10

Synchondroses- united by hyaline cartilage such as in the epiphyseal plate.

Symphyses-united with fibrocartilage plug or pad such as in pubic symphyses ( amphiarthrosis)

Question 11

Synovial Membrane

Answer 11

Delicate inner layer of the articular capsule

Cells of synovial membrane secrete synovial fluid

Question 12

Synovial Fluid functions

Answer 12

Lubrication
Metabolic functions
Shock absorption
Cells within a synovial joint depend on synovial fluid to provide oxygen and nutrients and remove metabolic byproducts

Question 13

Articular cartilage

Answer 13

Composed of hyaline cartilage

Reduces friction and absorbs shock