Chapter 6

Osteoblasts come from mesenchymal precursor cells.

true

An elderly woman trips and falls. She puts out her hand to try to stop her fall, and ends up with a fracture of the lower arm. An x-ray shows that at the break, many pieces of bone have a splintered and fragmented appearance. Which type of fracture does this woman have?

comminuted fracture

Which is not a function of calcium in the body?

epithelium function

The process of intramembranous ossification generates bone within a pre-existing template composed of mesenchymal tissue. In contrast, endochondral ossification generates bone within a pre-existing template composed of _____.

hyaline cartilage

Most of the bones of the skull are formed by this process.

intramembranous ossification

Bone can be classified as a connective tissue because it contains an extracellular matrix that surrounds widely spaced cells. True or False

true

During a needle biopsy of a person's bone marrow, maybe to test for the presence of cancer, pain is felt when the needle passes through the periosteum because it is richly supplied with nerves. true or false

true

With aging, bones can become more brittle. This brittleness is due to which factor?

with aging, there is a reduction in collagen synthesis by osteoblasts, which means a loss of tensile strength