Ch. 6 – Flashcards

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question
Which of the following is implicated in osteoporosis in older women?
answer
estrogen deficiency due to menopause
question
Which of the following is not a function of the skeletal system?
answer
communication
question
In newborn infants, the medullary cavity and all areas of spongy bone contain yellow bone marrow.
answer
False
question
Which structure allows the diaphysis of the bone to increase in length until early childhood?
answer
epiphyseal plate
question
Lengthwise, long bone growth during infancy and youth is exclusively through ________.
answer
interstitial growth of the epiphyseal plates
question
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
answer
Long
question
Which of the following statements best describes interstitial growth of cartilage?
answer
Chondrocytes in the lacunae divide and secrete matrix, allowing the cartilage to grow from within.
question
The cell responsible for secreting the matrix of bone is the ________.
answer
osteoblast
question
What is the structural unit of compact bone?
answer
the osteon
question
Choose the structures that most directly provide nutrients and remove wastes from osteocytes in compact bone.
answer
canaliculi
question
Sixty-five percent of the mass of bone is a compound called hydroxyapatite.
answer
True
question
Bones are classified by whether they are weight bearing or protective in function.
answer
False
question
Wolff's law is concerned with ________.
answer
the thickness and shape of a bone being dependent on stresses placed upon it
question
Cartilage has a flexible matrix that can accommodate mitosis of chondrocytes.
answer
True
question
The trabeculae of spongy bone are oriented toward lines of stress.
answer
True
question
The resilience of bone is thought to come from which of the following?
answer
sacrificial bonds in or between collagen molecules
question
In some cases the epiphyseal plate of the long bones of children closes too early. What might be the cause?
answer
elevated levels of sex hormones
question
Which of the following is a bone marking name that indicates an armlike bar of bone?
answer
ramus
question
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?
answer
18 year old male
question
Which of the following is the single most important stimulus for epiphyseal plate activity during infancy and childhood?
answer
growth hormone
question
Closure of the epiphyseal plate stops all bone growth.
answer
false
question
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.
answer
fibrocartilage
question
For intramembranous ossification to take place, which of the following is necessary?
answer
Ossification centers form in the fibrous connective tissue membrane.
question
What can a deficiency of growth hormone during bone formation cause?
answer
decreased epiphyseal plate activity
question
Ossification (Osteogenesis) is the process of ________.
answer
bone formation
question
The periosteum is a tissue that serves only to protect the bone because it is not supplied with nerves or blood vessels.
answer
false
question
Bones are covered and lined by a protective tissue called periosteum. The inner (osteogenic) layer consists primarily of ________.
answer
osteoblasts and osteoclasts
question
Select the bone disorder in which bone resorption outpaces bone deposit, leaving the person with thin and often very fragile bones?
answer
osteoporosis
question
The structure of bone tissue suits the function. Which of the following bone tissues is adapted to support weight and withstand torsion stresses?
answer
compact bone
question
What kind of tissue is the forerunner of long bones in the embryo?
answer
Hyaline cartilage
question
Choose the best location for obtaining a red bone marrow sample from a patient.
answer
head of femur
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