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Exam 6: Bones and Skeletal Tissue

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Question 31

Multiple Choice

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At what age do bones reach their peak density?

A) early adulthood
B) at birth
C) early childhood
D) late adulthood

E) A) and D)
F) A) and C)

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Question 32

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The structural unit of compact bone (osteon)resembles the growth rings of a tree trunk.

A) True
B) False

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Question 33

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In newborn infants,the medullary cavity and all areas of spongy bone contain yellow bone marrow.

Skeletal remains are discovered at an archeological site.X-rays of the femur show evidence of a thin epiphyseal plate.This bone likely belonged to which of the following?

The pubic symphysis connects the two hip bones anteriorly and provides a little movement during childbirth.Choose the most appropriate tissue for this structure that is subjected to both pressure and stretch.

Hematopoiesis refers to the formation of blood cells within the red marrow cavities of certain bones.

The periosteum is secured to the underlying bone by ________.

All bones stop growing by the end of adolescence.

Closure of the epiphyseal plate stops all bone growth.

Sixty-five percent of the mass of bone is a compound called hydroxyapatite.

Emily,a 64-year-old formerly obese woman who successfully lost over 100 pounds,was brought to the hospital suffering pain in her legs,and an X- ray revealed that she had a simple fracture in her right femur and a crack in her left tibia.Other tests revealed that her bones were brittle and porous.What might have happened to Emily,and what advice would she have been given by the physician?

Cranial bones develop ________.

Which of the following is the single most important stimulus for epiphyseal plate activity during infancy and childhood?

In humans,the effect of the hormone calcitonin is to ________.

Alice and James adopted a 3-year-old child from a developing country.They noticed that her legs were bowed and there were some deformities in her cranial and pelvic bones.They brought her to a physician for a diagnosis.What was the likely diagnosis,and what was the treatment for the disorder?

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

Yellow bone marrow contains a large percentage of ________.

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

The term diploë refers to the ________.

How can a tooth be moved in a bony socket during orthodontic treatment?