joints test 1

Question 1

what is the term for the point of contact between two bones?

Answer 1

articulations

Question 2

describe movement & strength for joints:

Answer 2

joints that allow more movement are hard to dislocate but allow less motion. very mobile joints are easy to dislocate.

Question 3

what is the term for immobile joint? give an example.

Answer 3

synarthrosis. ex. joints in skull bones.

Question 4

what is the term for a joint that allows slight movement? give an example.

Answer 4

amphiarthrosis. ex. distal tibia and fibula

Question 5

what is the term for a freely moving joint? give an example.

Answer 5

diarthrosis. ex. most limb joints(elbow etc.)

Question 6

what is the structural classification of joints?

Answer 6

based on joint structure. presence or absence of joint cavity.material joining bones.

Question 7

what is a fibrous joint?

Answer 7

has fibrous connective tissue that holds bones together and has no joint cavity.

Question 8

what are sutures(fibrous joint)?

Answer 8

joints between skull bones. bones have jagged edges so they interlock. very strong.

Question 9

what is the term for two bones held together by a ligament of fibrous connective tissue? give an example.

Answer 9

syndermosis(fibrous joint). ex. distal tibia and fibula in some cases ligament is large and wraps the bones.

Question 10

what is the term for a peg like tooth root fits into a scoket(alveoli) of maxilla or mandible held in by a periodontal ligament?

Answer 10

gomphosis(fibrous joint)

Question 11

what are cartilaginous joints?

Answer 11

cartilage joins the bones. no joint cavity.

Question 12

what type of cartilaginous joint uses hylaine cartilage as joining material?

Answer 12

synchondrosis

Question 13

what type of cartilaginous joint is fibrocartilage as joining material? give an example.

Answer 13

symphysis. pubic symphysis

Question 14

what is fluid filled cavity between the bones enclosed by articular capsule?

Answer 14

synovial joint

Question 15

what type of synovial joint forms wall of joint cavity made of connective tissue? name the 2 layers.

Answer 15

articular capsule.

1. fibrous capsule
2. synovial membrane

Question 16

what layer of the articular capsule is the outer layer made of dense irregular connective tissue and holds bones together?

Answer 16

fibrous capsule

Question 17

which layer of the articular capsule is the inner layer made of aerolar connective tissue secretes synovial fluid into joint cavity?

Answer 17

synovial membrane

Question 18

what are accessory ligaments?

Answer 18

bands of dense connective tissue that holds bones together.

Question 19

what is the extracapular ligament?

Answer 19

located outside joint capsule

Question 20

what is the intracapular ligament?

Answer 20

located inside joint cavity.

Question 21

what is articular cartilage?

Answer 21

hyaline cartilage where bones meet

Question 22

what is the extra pad of hylaine cartilage in cavity to help bones fit? not all joints have this

Answer 22

articular discs(meniscus)

Question 23

what is a plane joint( gliding joint)? give an example.

Answer 23

(type of synovial joint) both bones have flat surfaces. allows: forward & back side to side. doesn’t allow twisting. ex. carpal bones

Question 24

which what is a hinge joint and what does it allow?

Answer 24

(type of synovial joint)
one bone is a "C" shape the other is a cyllinder.
allows:
flexation- decreases angle between bones
extension- increase angle between bones

Question 25

what is a pivot joint and what doe sit allow?

Answer 25

(type of synovial joint)
one bone has a deep notch other bone has a cylindrical head, head rotates in notch.
allows:
rotation bone turns along long axis.

Question 26

what is a condyloid joint and what does it allow?

Answer 26

one bone is smooth and concave the other is smooth and convex typically oval shape.
allows:
flexation and extension
abduction- pull bone awayfrom mid line
adduction- pull bone toward midline
circumduction-tip of bone makes a circle.

Question 27

what is a saddle joint and what does it allow?

Answer 27

one bone looks like a riders legs the other is shaped like a saddle.
allows: flexation and extension, abduction and adduction and back and forth

Question 28

whattype of joint has a spherical head that fits into a deep cup-like socket on the other bone, and what does it allow?

Answer 28

ball and socket joint

allows: flexation, extension, abduction, adduction, circumduction, and rotation