| Question | Answer |
| The 3 parts of the lever system. | 1. Fulcrum: point of movement (joint).
2. Resistance: weight or force.
3. Effort: force exerted to overcome resistance. |
| Class 1 Lever | Balanced. Example: Scull balanced on the spinal column. |
| Class 2 Lever | Power. "Wheelbarrow". Example: the lower body area needed for forward momentum. |
| Class 3 Lever | Greatest movement. Range of motion, flexibility. Most common in the body. |
| Joint | The point where bones meet and movement occurs. |
| Classification of Joints:
A.
B. | A. Class by function.
B. Class by structure. |
| Class by Function:
1.
2.
3. | 1. Synarthrotic: no movement.
2. Ampiarthrotic: some movement.
3. Diarthrotic: free movement. |
| Class by Structure:
1.
2.
3. | 1. Fibrous (synarthrotic).
2. Cartilaginous (ampiarthrotic).
3. Synovial (diarthrotic) |
| Diarthrotic/Synovial Joints - 6 types: | 1. Hinge
2. Ball & Socket
3. Pivot
4. Ellipsoid/Condyloid
5. Saddle
6. Gliding |
| Articular Cartilage | Glass-like covering protecting ends of bones from friction while the articulate. |
| Fibrous Stratum | Tough fibrous structure that connects bones with eachother (fibrous capsule around joint). |
| Synovial Stratum | Membrane: secretes a viscous fluid that lubricates the joint. |
| Ellipsoid Joint | The oval-shaped end of one bone articulating with the elliptical basin of another. |
| Hinge Joint | Just like the door lock and the bathroom at Whidbey. |
| Pivot Joint | Like a donut rotating around a broom handle. |
| Gliding Joint | Occurs between 2 flat surfaces. |
| Saddle Joint | Modified ellipsod. Composed of convex and concave articulating surfaces (like 2 saddles). |
