BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 45, Problem 4A
How can osteocytes remain alive within bone?
a. Bones are composed of only dead or dormant cells.
b. Haversian canals are bone structures that contain blood vessels that provide materials for the osteocytes.
c. Osteocytes have membrane extensions that protrude from bone and allow them to exchange materials with the surrounding fluids.
d. Bones are hollow in the middle and the low pressure there draws fluid from the blood that nourishes the osteocytes.
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Students have asked these similar questions
How can osteocytes remain alive within bone?
a. Bones are composed of only dead or dormant cells.
b. Haversian canals are bone structures that contain blood vessels that provide materials for the osteocytes.
c. Osteocytes have membrane extensions that protrude from bone and allow them to exchange materials with the surrounding fluids.
d. Bones are hollow in the middle and the low pressure there draws fluid from the blood that nourishes the osteocytes.
The function of osteoblasts is to:
a.break down bone
b.produce blood cells
c.produce collagen for bone matrix
d.add new tissue to the periosteum
e.provide nourishment to the cells of the articular cartilage
Which is/are NOT a characteristic feature(s) of the cartilage degeneration mechanisms with osteoarthritis?
A. Loss of cartilage compressibility
B. Horizontal cracks parallel to articular surface cause large pieces of cartilage to break off
C. Cartilage wear is abrupt, quickly progressing from normal to completely worn
D.
Cartilage pitting leads to chondrocyte necrosis and autolysis
E.
Deeper chondrocytes proliferate and cluster in large lacunae in response to increasing loads
B and C
F.
G.
H.
C and D
None of the above
Chapter 45 Solutions
BIOLOGY
Ch. 45.1 - Compare hydrostatic skeletons, exoskeletons, and...Ch. 45.1 - Explain how animals with hydrostatic skeletons...Ch. 45.2 - Prob. 1LOCh. 45.2 - Prob. 2LOCh. 45.2 - Prob. 3LOCh. 45.3 - Prob. 1LOCh. 45.4 - Prob. 1LOCh. 45.4 - Prob. 2LOCh. 45.4 - Prob. 3LOCh. 45.5 - Prob. 1LO
Ch. 45.5 - Describe how friction and gravity affect...Ch. 45.5 - Prob. 3LOCh. 45 - Prob. 1IQCh. 45 - Exoskeletons and endoskeletons differ in that a....Ch. 45 - Worms use a hydrostatic skeleton to generate...Ch. 45 - Bone develops by one of two mechanisms depending...Ch. 45 - Which of the following statements best describes...Ch. 45 - Motor neurons stimulate muscle contraction via the...Ch. 45 - Prob. 6UCh. 45 - If you wanted to study the use of ATP during a...Ch. 45 - Place the following events in the correct order....Ch. 45 - You take X-rays of two individuals. Ray has been a...Ch. 45 - You have identified a calcium storage disease in...Ch. 45 - How do the muscles move your hand through space?...Ch. 45 - How can osteocytes remain alive within bone? a....Ch. 45 - Swimming underwater using forelimbs for propulsion...Ch. 45 - If a drug inhibits the release of ACh, what will...Ch. 45 - Prob. 1SCh. 45 - Prob. 2SCh. 45 - The nerve gas methylphosphonofluoridic acid...Ch. 45 - If natural selection favors the evolution of wings...
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- Explain why bone remodeling is important, and give its stepsarrow_forwardWhat gives bone its flexibility? a. Trabeculae b. Elastic fibers c. Inorganic salts d. Yellow bone marrow e. Collagen fibersarrow_forwardBisphosphonates are a class of medications that treat osteoporosis by slowing the breakdown of bone. What type of cells do bisphosphonates target? A. Osteoclasts B. Mesenchymal stem cells C. Osteocytes D. Osteoblastsarrow_forward
- The term osteoporosis refers to what type of bone? A. Denser B. Older C. More porous D. Brokenarrow_forwardAs the bone matrix calcifies and the secreting cells become walled in, A. osteoblasts become osteocytes B. osteogenic progenitors become osteoclasts C. osteoblasts become osteoclasts D. osteoclasts become osteocytesarrow_forwardWhich statement is true about osteomalacia? A. Osteomalacia can be caused excessive exposure to UV light. B. In children, osteomalacia is called rickets. C. The treatment involves taking vitamin B. D. All the statements listed are true.Properly explainarrow_forward
- Which of the following would be likely to prevent or slow the bone loss of osteoporosis? a. stimulate the activity of fibroblasts b. stimulate the activity of osteoblasts c. inhibit the activity of osteoclasts d. both (b) and (c)arrow_forwardWhich long bone structure is correctly matched with its description or function? a. epiphysis; the end of a bone that is composed of compact bone only b. articular cartilage; fibrocartilage located at the ends of a bone c. periosteum; responsible for growth in bone width d. perforating fibers; blood vessels that penetrate the bonearrow_forwardThe epiphysis is composed of a thin layer of bone that encloses a bone. A. compact, periosteum B. compact, spongy C. periosteum, spongy D. spongy, compactarrow_forward
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