BIOLOGY(LL)-W/ACCESS CODE >CUSTOM<
12th Edition
ISBN: 9781264058167
Author: Raven
Publisher: MCG CUSTOM
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Textbook Question
Chapter 45, Problem 1A
You take X-rays of two individuals. Ray has been a weight lifter and body builder for 30 years; Ben has led a mostly sedentary life. What differences would you expect in their X-rays?
a. No difference, they would both have thicker bones than a younger person due to natural thickening with age.
b. No difference, lifestyle does not affect bone density.
c. Ray would have thicker bones due to reshaping as a result of physical stress.
d. Ben would have thicker bones because bone accumulates like fat tissue from a sedentary lifestyle.
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You take X-rays of two individuals. Ray has been a weight lifter and body builder for 30 years; Ben has led a mostly sedentary life. What differences would you expect in their X-rays?
a. No difference, they would both have thicker bones than a younger person due to natural thickening with age.
b. No difference, lifestyle does not affect bone density.
c. Ray would have thicker bones due to reshaping as a result of physical stress.
d. Ben would have thicker bones because bone accumulates like fat tissue from a sedentary lifestyle.
Once we reach adulthood and our bones are fully formed and hardened, they cannot be remodeled
A. True
B. False
Which of the following is NOT correct?
A. Bone fracture is a partial or complete break in the continuity of the bone
B. Bone remodelling, continuing process of synthesis and destruction that gives bone its mature
structure and maintains normal calcium levels in the body
C. bone resorption the process by which osteoclasts break down the tissue in bones and release the
minerals
D. Osteoblasts release hydrochloric acid and acidic proteases such as cathepsin K, resulting in
degradation of the bone matrix and liberation of Ca, PO., and fragments of type I collagen
E. osteoblasts have receptors for PTH and, when activated, produce osteoclast stimulating factor
(cytokine)
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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