Ch.6: Group 2 - Section 6_4 - 6_5

During bone repair, the bony callus may last up to ________________.

3-4 months

How long does bone repair generally take?

6 weeks

What type of bone growth do you think a 40-year-old male experiences?

Appositional growth

Which hormone, produced by the thyroid gland, works opposite to parathyroid hormone (PTH)?

Calcitonin

A patient shows up in the emergency department with the end of the bone protruding through his skin. What type of fracture does he have?

Compound fracture

If a break occurs in the shaft of a thigh bone, what part of the bone has been broken?

Diaphysis

Which of the following sequences correctly lists the order of events that occur during fracture healing?

Hematoma forms -> soft callus forms -> hard callus forms -> remodeling occurs

Which of the following statements about bone remodeling is false?

It occurs only at the articular surface.

Which of the following organs does not directly regulate blood calcium concentration in response to parathyroid hormone (PTH)?

Liver

Which of the following hormones inhibits bone growth?

Parathyroid hormone

What hormone promotes an increase in the activity of osteoclasts?

Parathyroid hormone (PTH)

Which of the following factors promotes bone resorption?

Pressure

Which vitamin is important for the synthesis of collagen?

Vitamin C

Within the epiphyseal plate, which zone houses actively dividing cartilage cells in their lacunae?

Zone of proliferation

As a result of males producing more testosterone at puberty, __________.

appositional bone growth increases

The thickness of bones increase as an individual grows into adulthood by ______________.

appositional growth

For a person who starts running for exercise, __________.

bone deposition exceeds bone resorption

When blood calcium levels rise above normal, osteoclast activity is inhibited by the hormone ___.

calcitonin

Bone growth and remodeling depends on adequate intake of __________.

calcium, vitamin C, and vitamin K

A greenstick fracture occurs primarily in _____________.

children

A ____ fracture results when the bone is shattered into multiple fragments.

comminuted

When the cartilage at the epiphyseal plate stops dividing, the bony structure that forms is known as the _____.

epiphyseal line

Appositional growth produces __________.

growth in width

Increasing mechanical stress will cause bone to become stronger by ________________.

increasing deposition of mineral salts

Bone remodeling involves all of the following factors except:

intramembranous and endochondral ossification.

Bone lengthens by _____ growth and thickens by ____ growth.

longitudinal; appositional

Bone resorption requires the activity of __________.

osteoclasts

Out of the numerous factors that influence bone growth and remodeling, ______ do (does) not.

the amount of fibrocartilage available

All of the following factors will affect osteoblast and osteoclast activity except:

yellow bone marrow.

The stacked chondrocytes undergo rapid cell division within the

zone of proliferation.