Anatomy: Bone Formation

A fracture in the ________ can impair the lengthwise growth of bones in a child.

epiphyseal plate

You're assisting with an exam for a young boy who broke the distal ends of his fibula and tibia. The physician examined the X-ray and discussed the evaluation with the family. The conversation focused on the potential loss of lengthwise growth at the broken end of the boy's bones. From this information, you assess the break must have affected the ________.

epiphyseal plate

The physician knew her patient was most likely a child before she walked into the examination room because the X-ray revealed a(n) ________.

greenstick fracture

What kind of tissue is the forerunner of long bones in the embryo?

hyaline cartilage

During soccer practice, Sadie tripped and tried to stop her fall with her outstretched arms. Her humerus broke and the broken ends were forced into each other. Sadie suffered a(n) __________ fracture.

impacted

Which of the following could create an open, or compound, fracture?

when the broken bone penetrates through the skin

Bone growth in width that occurs due to weight lifting at age 40 is most likely ________.

appositional growth

In what type of fracture is the bone broken into many fragments?

comminuted

A bone fracture that results in the bone being broken into many fragments is a ________.

comminuted fracture

There are four stages in the healing of a bone fracture. Which of the following best illustrates the sequence of these stages? 1. bony callus formation 3. fibrocartilage callus formation 2. bone remodeling 4. hematoma formation

4, 3, 1, 2

How does the formation of a bony callus assist with the process of bone healing after a fracture?

The bony callus is made of spongy bone, which replaces the fibrocartilage callus.

What step occurs first in the embryonic development of most bones?

a bony collar forms

The process of bone formation is known as ________

ossification

What type of bone cell is primarily active when bone growth occurs?

osteoblast

During the repair of a fracture, which of the following cells form the bony callus?

osteoblasts

When growing bones widen through appositional growth, what cells add bone matrix to the outside of the diaphysis?

osteoblasts

While playing soccer, Lauren received a ragged fracture to her fibula due to twisting her leg. This type of fracture is ________.

spiral fracture

What determines where bone matrix will be remodeled?

the pull of gravity and muscles on the skeleton and calcium ion levels in the blood