Exam 6: Bones and Skeletal Tissues

Each consecutive bone lamella has collagen fibers that wrap in alternating directions.

For intramembranous ossification to take place, which of the following is necessary?

Why are the bones of young children much more flexible than those of the elderly?

Which of the following is implicated in osteoporosis in older women?

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

An osteon contains osteocytes, lamellae, and a central canal, and is found in compact bone only.

When does prevention of osteoporosis start?

Wolff's law is concerned with ________.

At an archeological site you discover a bone that is cylindrical in shape, about one inch long and a quarter of an inch wide. Choose the correct classification.

Ossification (Osteogenesis) is the process of ________.

Bones are classified by whether they are weight bearing or protective in function.

The process of bones increasing in thickness is known as ________.

A 75-year-old woman and her 9-year-old granddaughter were victims of a train crash. In both cases, trauma to the chest was sustained. X rays of the grandmother revealed several fractured ribs, but her granddaughter had none. Explain these different findings.

Growth of bones is controlled by a symphony of hormones. Which hormone is of greatest importance for bone growth during infancy and childhood?

What is the structural unit of compact bone?

Cranial bones develop ________.

Bones are constantly undergoing resorption (breaking bone down) for various reasons. Which of the following cells accomplishes this process?

Johnny fractured the lower third of his right tibia in a skiing accident. The soft tissues in the area wereseverely damaged and their surgical removal was necessary. After prolonged immobilization, it was found that Johnny was healing very poorly. The explanation offered by the orthopedic surgeon was thatvascularization of the fracture site was still inadequate and good healing was absolutely dependent upon an adequate blood supply. Describe how a long bone receives its blood supply and trace the path ofnutrient delivery to the osteocytes.

If your doctor notices a marked decrease in calcium ion levels in your blood, what gland might he suspect is not functioning properly and why?

If your elderly patient's blood calcium level is normal, does that mean the patient does not have osteoporosis? Explain.