Question 1

When testosterone is increased in males at puberty,epiphyseal plates

Accepted Answer

A)  widen.
B)  become narrower.
C)  increase slowly.
D)  accelerate rapidly
E)  are hardly affected.F) A) and E)
G) B) and E)

Question 2

________ accounts for almost two-thirds of the weight of bone.

Accepted Answer

A)  Water
B)  Calcium carbonate
C)  Collagen fibers
D)  Fluoride
E)  Calcium phosphateF) B) and E)
G) A) and D)

Question 3

The interconnecting struts and plates found in spongy bone are called

Accepted Answer

A)  osteons.
B)  trabeculae.
C)  concentric lamellae.
D)  interstitial lamellae.
E)  lacunae.F) A) and B)
G) B) and E)

Question 4

Osteocytes are embedded in a dense matrix of hydroxyapatite.Which of the following describes how osteocytes receive nutrients?

Accepted Answer

A)  by osmosis from neighboring osteocytes.
B)  by diffusion from neighboring osteoblasts cells traveling through lamellae.
C)  by diffusion from nutrients released from vessels in the central canal that travel through canaliculi.
D)  by diffusion from nutrients released from vessels in the central canal that travel through perforating canals.
E)  by diffusion directly from nutrients stored in the periosteum.F) All of the above
G) B) and C)

Question 5

After a fracture of the diaphysis has healed,the thickened region that results is called the

Accepted Answer

A)  epiphyseal plate.
B)  external callus.
C)  dense tuberosity.
D)  condyle.
E)  fracture facet.F) C) and E)
G) C) and D)

Question 6

Figure 6-2
-What type of tissue occurs at "1"?

Accepted Answer

A)  elastic tissue
B)  fibrocartilage
C)  bone
D)  hyaline cartilage
E)  marrow tissueF) A) and B)
G) None of the above

Question 7

How does calcitonin act to lower blood calcium?

Accepted Answer

A)  Increases osteoblast break down of bone matrix,increases calcitriol production,increases intestinal absorption,and decreases renal excretion
B)  Increases osteoclast break down of bone matrix,decreases calcitriol production,increases intestinal absorption,and decreases renal excretion
C)  Decreases osteoblast break down of bone matrix,increases calcitriol production,increases intestinal absorption,and decreases renal excretion
D)  Decreases osteoclast break down of bone matrix,decreases calcitriol production,decreases intestinal absorption,and increases renal excretion
E)  Increases endochondral ossificationF) A) and D)
G) D) and E)

Question 8

The space occupied by an osteocyte is called a

Accepted Answer

A)  Volkmann's canal.
B)  lacuna.
C)  trabecula.
D)  Haversian canal.
E)  Venetian canal.F) A) and E)
G) A) and D)

Question 9

In compact bone,the osteons are

Accepted Answer

A)  arranged in concentric lamellae.
B)  lined up perpendicular to the long axis.
C)  arranged in an irregular pattern.
D)  separated by medullary spaces.
E)  lacking in the diaphysis.F) A) and E)
G) C) and D)

Question 10

Which of the following bones is classified as "irregular" in shape?

Accepted Answer

A)  patella
B)  frontal
C)  vertebra
D)  metatarsal
E)  ulnaF) A) and B)
G) A) and C)

Question 11

Cells that are found in small depressions on the endosteal surfaces are the

Accepted Answer

A)  osteoblasts.
B)  osteocytes.
C)  osteoid.
D)  osteogenic cells.
E)  osteoclasts.F) A) and D)
G) All of the above

Question 12

Elevated levels of calcium ion in the blood stimulate the secretion of the hormone

Accepted Answer

A)  calcitonin.
B)  thyroid hormone.
C)  parathyroid hormone.
D)  growth hormone.
E)  testosterone.F) D) and E)
G) All of the above

Question 13

How would the compressive strength of a bone be affected if the ratio of collagen to hydroxyapatite increased?

Accepted Answer

A)  The compressive strength would decrease and the bone would become more flexible.
B)  The compressive strength would decrease and the bone would become less flexible.
C)  The compressive strength would increase and the bone would become more flexible.
D)  The compressive strength would increase and the bone would become less flexible.
E)  The compressive strength would not change but the bone would become more flexible.F) A) and B)
G) D) and E)

Question 14

Which of the following are not components of the skeletal system?

Accepted Answer

A)  tendons
B)  bones
C)  ligaments
D)  cartilagesE) All of the above
F) B) and C)

Question 15

Distinguish between the periosteum and the endosteum.

Accepted Answer

The periosteum is the superficial layer ...

Question 16

The smooth,rounded articular process of a bone is termed a

Accepted Answer

A)  crest.
B)  ridge.
C)  spine.
D)  condyle.
E)  trochlea.F) B) and D)
G) B) and C)

Question 17

The hormone calcitonin

Accepted Answer

A)  stimulates osteoclast activity.
B)  decreases the rate of calcium excretion.
C)  decreases the rate of calcium absorption.
D)  decreases the level of calcium ion in the blood.
E)  stimulates osteoblasts and inhibits osteoclasts.F) A) and B)
G) A) and C)

Question 18

The structural units of mature compact bone are called

Accepted Answer

A)  lacunae.
B)  osteocytes.
C)  osteons.
D)  canaliculi.
E)  lamellae.F) C) and D)
G) None of the above

Question 19

What is the difference between ossification and calcification?

Accepted Answer

Ossification means specificall...

Question 20

Which three organ systems coordinate to maintain normal blood calcium level?

Accepted Answer

A)  skeletal system,respiratory system,cardiovascular system
B)  cardiovascular system,respiratory system,lymphatic system
C)  skeletal system,muscular system,integumentary system
D)  skeletal system,digestive system,urinary system
E)  cardiovascular system,urinary system,respiratory systemF) C) and D)
G) A) and E)

Exam 6: Bones and Bone Structure

The hormone calcitonin

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After a fracture of the diaphysis has healed,the thickened region that results is called the

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The structural units of mature compact bone are called

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How does calcitonin act to lower blood calcium?

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The interconnecting struts and plates found in spongy bone are called

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Which three organ systems coordinate to maintain normal blood calcium level?

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________ accounts for almost two-thirds of the weight of bone.

Correct AnswerverifiedShow Answer

The space occupied by an osteocyte is called a

Correct AnswerverifiedShow Answer

How would the compressive strength of a bone be affected if the ratio of collagen to hydroxyapatite increased?

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Which of the following bones is classified as "irregular" in shape?

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Distinguish between the periosteum and the endosteum.

Correct AnswerverifiedThe periosteum is the superficial layer ...View AnswerShow Answer

The smooth,rounded articular process of a bone is termed a

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What is the difference between ossification and calcification?

Correct AnswerverifiedOssification means specificall...View AnswerShow Answer

When testosterone is increased in males at puberty,epiphyseal plates

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Cells that are found in small depressions on the endosteal surfaces are the

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Elevated levels of calcium ion in the blood stimulate the secretion of the hormone

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Osteocytes are embedded in a dense matrix of hydroxyapatite.Which of the following describes how osteocytes receive nutrients?

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Which of the following are not components of the skeletal system?

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In compact bone,the osteons are

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Figure 6-2 -What type of tissue occurs at "1"?

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The periosteum is the superficial layer ...
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Ossification means specificall...
View Answer

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