Greg trips over a toy and experiences a sharp pain. His physician diagnosis a torn meniscus. Greg has injured his
Classifying joints as synarthrotic, amphiarthrotic, or diarthrotic represents
the degree of movement possible at the joint.
When a joint is immobilized for a prolonged time, there is danger that
articular cartilage will degenerate.
What is a synovial joint?
Condylar, ball-and-socket, saddle, hinge
lifting the arm horizontally to form a right angle with the side of the body or moving a part away from the midline
Artificial joints are built of
silicone polymers for small joints and metals for large joints.
Which of the following best describes the causes of common forms of arthritis?
Rheumatoid arthritis is an autoimmune disease and osteoarthritis is caused by effects of aging.
Kicking a soccer ball is flexion of the leg at the knee joint as the foot draws back and then extension as it contacts the ball.
Which is a function of bone?
To protect soft tissues, to house the tissue that manufactures blood cells, to store inorganic salts, to provide a framework for the body.
What is found in spongy bone?
trabeculae, canaliculi, osteoblasts, periosteum
Compact bone has ________, whereas spongy bone has __________.
tightly packed tissue that is solid, strong, and resistant to bending; cancellous bone that reduces the weight of bone
The white material that reduces friction at the ends of bones is called
Articular cartilage is
A six-month-old baby is admitted to the hospital for the third time for a broken bone, and the parents are arrested on charges of child abuse. The defense lawyer gets the charges dropped after the results of genetic tests come back for which condition?
A bone does NOT thicken by
activity of osteocytes in the medullary cavity, increased secretion of calcium salts by osteoclasts, increased activity of the epiphyseal plate, adding blood vessels and nerves.
Osteoblasts are ______, whereas osteocytes are ______.
bone-forming cells; mature bone cells
A vitamin D deficiency results in ______, whereas a vitamin A deficiency results in ______.
rickets; retardation of bone development
Which is a step in endochondral bone formation?
hyaline cartilage develops into the shape of the future bone; periosteum forms from connective tissue outside the developing bone; ostoblasts deposit osseous tissue in place of disintegrating cartilage; osteoblasts deposit a thin layer of compact bone beneath the periosteum.
What is an example of an intramembranous bone?
Broad, flat skull bones
Osteoblasts deposit bone matrix around themselves and become osteocytes when they are isolated in lacunae.