In which of the following locations in a growing bone would the greatest osteoclast activity be found?
A. articular cartilage
B. perichondrium
C. epiphyseal plate
D. epiphysis
E. medullary cavity
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Question 2) The remodeling of bone tissue is a function of
A. chondrocyte and osteocyte activity.
B. fibroblast and chondroblast activity.
C. osteoclast and osteocyte activity.
D. osteoblast and osteoclast activity.
E. chondroblast and osteoclast activity.
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Question 3) Which of the following statements about bone remodeling and repair is correct?
A. Bone remodeling involves removal of old bone by osteoblasts.
B. The rate of bone remodeling increases in the elderly.
C. Exposure of a bone to increased mechanical stress can lead to bone remodeling.
D. Bone remodeling does not involve the activity of the osteoclasts and the osteoblasts.
E. As a long bone increases in diameter, the size of the marrow cavity decreases.
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Question 4) What chemical ingested or synthesized by the body is necessary for calcium absorption from the intestines?
A. growth hormone
B. calcitonin
C. parathyroid hormone
D. vitamin D
E. sex hormones
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Question 5) What chemical stimulates interstitial cartilage and appositional bone growth?
A. sex hormones
B. growth hormone
C. calcitonin
D. parathyroid hormone
E. vitamin D
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Question 6) Twelve-year old Madeline has not yet experienced a bone growth spurt, meaning she is not yet producing which particular chemicals necessary for this to occur?
A. calcitonin
B. sex hormones
C. parathyroid hormone
D. vitamin D
E. growth hormone
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Question 7) A young boy (10 years old) exhibited the following symptoms: advanced development of secondary sexual characteristics and rapid growth. Which of the following caused his condition?
A. hyposecretion of estrogen
B. hypersecretion of vitamin D
C. hypersecretion of testosterone
D. hypersecretion of growth hormone
E. hypersecretion of estrogen
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Question 8) A boy grew rapidly and reached a height of 6'2 by the time he was 13. He had normal body proportions and sexual development was only slightly retarded. Which of the following caused his condition?
A. elevated vitamin D synthesis
B. hypersecretion of growth hormone
C. hypersecretion of testosterone
D. hyposecretion of growth hormone
E. an adrenal tumor that secretes androgens
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Question 9) The growth spurt seen in puberty is triggered by
A. calcitonin.
B. growth hormone.
C. sex hormones.
D. parathyroid hormone.
E. thyroid hormone.
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Question 10) Bone growth at the articular cartilage is responsible for bone growth of
A. long bones.
B. only the cartilage.
C. flat bones.
D. short bones.
E. irregular bones.
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