BIOLOGY(LL)-W/ACCESS CODE >CUSTOM<
12th Edition
ISBN: 9781264058167
Author: Raven
Publisher: MCG CUSTOM
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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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Once we reach adulthood and our bones are fully formed and hardened, they cannot be remodeled
A. True
B. False
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.
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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- Injury to bone heals more quickly than injury to cartilage because: a. bone marrow contains stem cells b. chondroblasts are only present during prenatal development c. the polysaccharides in cartilage ground substance can’t be replaced d. there is a richer blood supply to bone e. bone has a higher mineral contenarrow_forwardIncreasing bone size is considered Growth, while developing the ability to walk is considered Development: Select one: O a. False O b. Truearrow_forwardWhich of the following choices is CORRECT? A. trabeculae is the basic functional unit of compact bone B. Ca;(PO4); (hydroxyapatite) is the inorganic minerals contained in bone extracellular matrix C. Testosterone is hormone that is used in hormone therapy to reduce osteoporosis in males D. Rickets is a condition that may cause bow legs in a child E. Parathyroid hormone (PTH) functions to decrease the level of calcium in the blood F. All of the above G. A, B, and E H. Both C and Darrow_forward
- Which of the following choices is CORRECT? A. trabeculae is the basic functional unit of compact bone B. Ca(PO.): (hydroxyapatite) is the inorganic minerals contained in bone extracellular matrix C. Testosterone is hormone that is used in hormone therapy to reduce osteoporosis in males D. Rickets is a condition that may cause bow legs in a child E. Parathyroid hormone (PTH) functions to decrease the level of calcium in the blood F. All of the above G. A, B, and E H. Both C and Darrow_forwardMatch the definitions with the correct term. osteoblast A. The layer that lines medullary cavity of a long bone B. epiphyseal fracture Stem cells for bone tissue that differentiates into other types of bone cells C. osteogenic cell In the structure of compact bone, circular layers of bone matrix that forms the D. periosteum osteons. concentric lamellae The process where bone tissues are continuously recycled and renewed with organic and mineral components of the bone matrix throughout life E. bone remodeling F. Which fracture can affect a child's growth in height if not treated carefully? endosteum G. H. greenstick fracturearrow_forwardRunning, or exercise/sports in general at the recreational level, is not associated with an increased risk of osteoarthritis of the lower limb joints. Why is this? Healthy cartilage is really good at repairing itself from damage in adulthood. Don't know for sure, but it's suspected that the strains involved trigger the cartilage to grow stronger, especially when young. O The peak loads these movements place on joints are small, similar to the peak loads in walking O The stress-life of cartilage is long enough that these activities cannot exhaust itarrow_forward
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