Chapter 5: Lesson 2

Question 1

Skeletal system

Answer 1

A description of the bones of the body.

Question 2

Osteoporosis

Answer 2

A condition of reduced bone mineral density, which increases risk of bone fracture.

Question 3

Joints

Answer 3

The sites where two bones meet and movement occurs as a result of muscle contraction.

Question 4

Axial skeleton

Answer 4

A division of the skeletal system consisting of the skull, the rib cage, and the vertebral column.

Question 5

Appendicular skeleton

Answer 5

A division of the skeletal system consisting of the arms, legs, and pelvic girdle.

Question 6

Levers

Answer 6

Rigid rods where muscles attach.

Question 7

Remodeling

Answer 7

The process by which bone is constantly renewed by the resorption and formation of the bone structure.

Question 8

Osteoclasts

Answer 8

Special cells that break down and remove old bone tissue.

Question 9

Osteoblasts

Answer 9

Special cells that form and lay down new bone tissue.

Question 10

Wolff’s law

Answer 10

Scientific explanation of how remodeling (new bone growth) occurs along the lines of stress placed on the bone.

Question 11

Depressions

Answer 11

Flattened or indented portions of bone.

Question 12

Processes

Answer 12

Projections protruding from the bone where tendons and ligaments can attach.

Question 13

Vertebral column

Answer 13

Bones that house the spinal cord; consists of the cervical, thoracic, and lumbosacral regions.

Question 14

Spinal cord

Answer 14

Bundle of nerves housed within the vertebrae.

Question 15

Intervertebral discs

Answer 15

Fibrous cartilage structures between vertebrae that act as shock absorbers and assist with movement.

Question 16

Neutral Spine

Answer 16

Represents a position in which the vertebrae and associated structures are under the least amount of load and can most optimally support functional movement.