Module 3 - ost phys

Question 1

What is the difference between dense regular and dense irregular connective tissue?

Answer 1

Dense regular: oriented to common plane of movement. Adapted to sustain a normal, recurring movement/pressure change. In tendons, sutures and teeth

Dense Irregular: numerous fibre orientations, adapted to sustain many movements. In gut organs, lymph nodes, pericardium, synovial joint capsules

Question 2

Fibroblasts thicken ______ to reinforce the tissue.

Answer 2

ECM (ground substances supporting tissue)

Question 3

Sharpey’s fibres are found in

Answer 3

sutures, teeth and link tendons to bone

Question 4

Braces for teeth work off of the effectiveness of this fibre….

Answer 4

Sharpey’s fibres

• because they prefer slow, gentle movement
• resist high amounts of force and fast movement

Question 5

What are the 2 types of cartilaginous joints?

Answer 5

Primary and secondary

Question 6

What are cartilaginous joints composed of?

Answer 6

Chondrocytes, the cell of cartilage

Question 7

Primary cartilaginous joints are found…

Secondary cartilaginous joints are found….

Answer 7

primary - growth plates (ossify with age)

secondary - intervertebral discs, costal chondral cartilage(s), pubic symphysis

Question 8

Cartilaginous joints are made up of these 5 things….

Answer 8

collagen, kerratin, water, chondroitin sulfate (a glycosaminoglycan “GAG”), and hyaluronic acid (which is also a GAG)

Question 9

What is one of the main types of glycosaminoglycan?

Answer 9

Hyaluronic Acid
HA is produced by chondrocytes (also by synoviocytes and fibroblasts elsewhere)
-HA attracts water and maintains it in the area

Question 10

T/F

Cartilage has no directly blood supply and relies on diffusion to maintain necessary fluid content.

Answer 10

True

Question 11

T/F

Pubic symphysis does not move throughout your lifetime

Answer 11

False
Moves during normal body function - ex walking
Move quite a bit during childbirth - influenced by Relaxin hormone

Question 12

Pubic symphysis is what type of joint?

Answer 12

Fibro-cartilaginous

Question 13

T/F

Synovial joints have to have a cavity.

Answer 13

True - because they have fluid

Question 14

Synovial joints have a capsule and cavity.

T/F
The external is continuous with the ligaments &
The internal is continuous with the synovial membrane

Answer 14

True

Question 15

Cartilaginous pads gets their nutrients from….

Answer 15

synovial fluid
which gets pushed in under pressure and sucked out under traction/decompression.
It requires regular movement of synovial fluid to maintain life.

Question 16

What is synovial fluid composed of?

Answer 16

water and hyaluronic acid (produced by synoviocytes in the membrane)

Question 17

Synovial fluid is an ___________, which is fluid passed through a membrane.

Answer 17

Ultrafiltrate
Synovial fluid is a product of blood plasma.
It is influenced by pressure, vascular and local mechanical.

Question 18

Synovial fluid is used for …..(3 things)

Answer 18

lubrication, nourishing the cartilage, and carrying out force transference