Skeletal system & joints

Question 1

What is the origin?

Answer 1

The end of the muscle fixed to the stationary bone.

Question 2

What is the insertion?

Answer 2

Theattachment to the movable bone of the other end of the muscle.

Question 3

A muscle that causes a desired action is called?

Answer 3

The agonist or prime mover.

Question 4

What are the associated structures of the skeletal system?

Answer 4

Tendons, ligaments & joints.

Question 5

What are the 5 main functions of the skeletal system?

Answer 5

1. It provides a scaffold to support the weight of the rest of the body.
2. It facilitates movement by being points of attachment for muscles.
3. It protects vital organs.
4. It produces red blood cells.
5. It stores and releases mineral salts and fats, like calcium, phosphorus, sodium & potassium.

Question 6

What is the function of;
1. Flat bone
2. Irregular bone
3. Long bone
4. Sesamoid bone
5. Short bone

Answer 6

1. Protects internal organs
2. Variable structure helps protect different structures
3. Supports weight and allows movement
4. Protects tendons
5. Provide stability and some movement

Question 7

Example of a ball and socket joint

Answer 7

Humerus and scapula

Question 8

Example of a hinge joint

Answer 8

Humerus and ulna

Question 9

Example of a saddle joint

Answer 9

Carpal bone and metacarpal bone of the thumb

Question 10

Example of a pivot joint

Answer 10

Radius and ulna

Question 11

Example of a gliding joint

Answer 11

Carpal bones

Question 12

Example of a condyloid joint

Answer 12

Metacarpal bone and phalanx