Joints

Question 1

What is the function of joints?

Answer 1

To hold bones together and allow skeleton flexibility to move

Question 2

How are joints classified?

Answer 2

How much motion they allow

Question 3

What are the 3 types of functional classification of joints?

Answer 3

Synarthrosis
Amphiarthrosis
Diarthrosis

Question 4

Synarthrosis

Answer 4

Doesn’t allow any movement

Question 5

Amphiarthrosis

Answer 5

Allows only a small amount of movement

Question 6

Diarthrosis

Answer 6

Freely moveable with a variety of movement types

Question 7

What are the 3 types of structural classification of joints?

Answer 7

Fibrous joints
Cartilaginous joints
Synovial joints

Question 8

Fibrous joints are joined together by ________________ tissue

Answer 8

Dense regular collagenous CT

Question 9

Cartilaginous joints are connected together by __________

Answer 9

Cartilage

Question 10

Joints are connected to….

Answer 10

At least one other bone in the body

Question 11

What are the 3 types of fibrous joints?

Answer 11

Sutures
Syndesmosis
Gumphosis

Question 12

What are Sutures and give an example of one

Answer 12

An immovable joint joined by short fibers

Ex: bones of skull

Question 13

What are syndesmosis and give an example?

Answer 13

Joints that allow a small amount of movement and are joined by short ligaments
Ex: between tibia and fibula and ulna and radius

Question 14

Gumphosis

Answer 14

Immovable joints joined by short ligaments

Ex: between each tooth and bony socket

Question 15

What are the two types of cartilaginous joints?

Answer 15

Symphysis

Sychondrosis

Question 16

What is symphysis and give an example

Answer 16

A flat disc or plug of fibrocartilage that is Amphiarthrosis
Ex: intervertebral joints, pubic symphysis

Question 17

What is synchondrosis and give an example

Answer 17

Bone connected by hyaline cartilage and is Synarthrosis

Ex: ribs, sternum, and epiphyseal plates

Question 18

The structural elements of synovial joints consist of…..

Answer 18

Joint cavity, articular capsule, articular cartilage, synovial fluid, avascular, adipose tissue, nerves, and blood vessels

Question 19

What are the 3 support structures for synovial joints?

Answer 19

Ligaments, tendons, bursa

Question 20

Ligament

Answer 20

Link bone to bone

Question 21

Tendons

Answer 21

Connect muscle to bone

Question 22

Bursa

Answer 22

Synovial fluid filled space between movable parts

Question 23

Non axial joints

Answer 23

Motion occurs in one or more planes around an axis

Ex: between carpals

Question 24

Uniaxial joints

Answer 24

Motion occurs around 1 axis

Ex: elbow joint

Question 25

Biaxial joints

Answer 25

Motion occurs around two axes

Ex: proximal phalanges and metacarpals

Question 26

Multiaxial joints

Answer 26

Motion around 3 axes

Ex: shoulder

Question 27

What are the 6 types of synovial joints?

Answer 27

Gliding or plane, hinges, pivot, condyloid, saddle, ball and socket

Question 28

Gliding or planes

Answer 28

Between flat surfaces of two bones, nonaxial

Ex: inter carpals/ tarsals, vertebrae

Question 29

Hinge

Answer 29

Convex surface of one bone fits into a concave surface of another bone
Uniaxial
Ex: elbow

Question 30

Pivot

Answer 30

Round end of one bone rest in shallow groove of another bone
Uniaxial
Ex: between axis/ atlas and radius/ ulna

Question 31

Condyloid

Answer 31

Convex surface of one bone fits into shallow concave surface of another bone
Biaxial
Ex: occipital/ atlas, metacarpals/ phalanges

Question 32

Saddle

Answer 32

Both bones have both a concave and convex region
Biaxial
Ex: between thumb, metacarpals/wrist bone, sternum/ clavicle

Question 33

Ball and socket

Answer 33

Spherical part of one bone fits into cube like depression of the other bone
Multiaxial
Ex: shoulder/ hip