Exam 2 - MSK 2 Articular Structure & Pathology

Question 1

What 4 parts make up the Synovial Joint?

Answer 1

1. Joint Capsule
2. Joint Space (cavity)
3. Synovial Fluid
4. Articular Cartilage

Question 2

What are the two layers and contents of the Joint Capsule?

Answer 2

Outer layer=Fibrous Capsula aka Stratum Fibrosum. Poor blood supply, rich in sensory/joint receptors

Inner layer=Synovium aka Stratum Synovium. Type A and Type B cells.

Question 3

Where are Type B cells in the Synovial Joint? What two things do they secrete?

Answer 3

Inner layer of joint capsule called “synovium”.

1. HA “gel” to improve viscosity and attract water
2. Lubricin to reduce friction

Question 4

Where are Type A cells in the Synovial Joint? What two things do they secrete and one thing it ingests?

Answer 4

Immune function.

1. Immunoglobulins
2. Lysosomal enzymes

Ingest debris.

Question 5

What is the Joint Space enclosed by and filled with?

Answer 5

Enclosed by capsule, filled with synovial fluid.

Question 6

Describe Synovial Fluid and two things it provides

Answer 6

Clear, viscous fluid.

1. Provides lubrication for joint surfaces to create “frictionless” surfaces between bones.
2. Provides huge rule in nutrition and turnover.

Question 7

What are the rest and movement “Thixotropic Properties” of synovial fluid?

Answer 7

Rest=Synovial fluid resists movement of joint

Movement=Synovial fluid provides less resistance to movement

Question 8

Describe Articular Cartilage and its function in friction and compression

Answer 8

Thin covering on ends of most bones. Reduces friction, absorp/disperse compression forces.

Question 9

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Answer 9

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