BIOLOGY(LL)-W/ACCESS CODE >CUSTOM<
12th Edition
ISBN: 9781264058167
Author: Raven
Publisher: MCG CUSTOM
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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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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.
Why are osteocytes spread out in bone tissue?a. They develop from mesenchymal cells.b. They are surrounded by osteoid.c. They travel through the capillaries.d. Formation of osteoid spreads out the osteoblasts that formed the ossification centers.
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
Chapter 45 Solutions
BIOLOGY(LL)-W/ACCESS CODE >CUSTOM<
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_forwardWhich 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 abovearrow_forwardWhat gives bone its flexibility? a. Trabeculae b. Elastic fibers c. Inorganic salts d. Yellow bone marrow e. Collagen fibersarrow_forward
- Bisphosphonates 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_forwardAlthough a common myth about bones is that it is dead, our bones are constantly changing. For example, bone deposition (formation) occurs where bone is injured or added strength is needed. During this time, there will be the most abundant levels of which bone cells? A. osteoclasts B. osteoblasts C. chondrocytes D. none of thesearrow_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_forward
- The term osteoporosis refers to what type of bone? A. Denser B. Older C. More porous D. Brokenarrow_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_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
- Of the 3 kinds of cells found in cartilage, which helps build cartilaginous tissue? Group of answer choices a. osteocytes b. chondroblasts c. osteoblasts d . chondroclasts Since cartilage is largely avascular, how do cartilaginous cells receive nutrients? Group of answer choices a. from nearby capillaries b. diffusion through the matrix c. from the canaliculi throughout d. from nearby nervous tissuearrow_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_forwardIn endochondral ossification, what happens to the chondrocytes? a. They develop into osteocytes. b. They die in the calcified matrix that surrounds them and form the medullary cavity. c. They grow and form the periosteum. d. They group together to form the primary ossification center.arrow_forward
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