A human femur (thighbone) is essentially a hollow tube filled with yellow marrow (see Figure 13). If the outer radius is r and the inner radius is rin, an important quantity characterizing such bones is r'in k = The density of bone is approximately 1.8 g/cm’ and that of marrow is about 1 g/cm'. For a femur with length L, express its mass as a function of k. nutrient canal location of yellow marrow compact bone tissue spongy bone tissue FIGURE 13 Structure of a human femur Source: From Starr. Biology, 8E © 2011 Brooks/ Cole, a part of Cengage Learning, Inc. Reproduced by permission. www.cengage.com/permissions

A human femur (thighbone) is essentially a hollow tube filled with yellow marrow (see Figure 13). If the outer radius is r and the inner radius is rin, an important quantity characterizing such bones is r'in k = The density of bone is approximately 1.8 g/cm’ and that of marrow is about 1 g/cm'. For a femur with length L, express its mass as a function of k. nutrient canal location of yellow marrow compact bone tissue spongy bone tissue FIGURE 13 Structure of a human femur Source: From Starr. Biology, 8E © 2011 Brooks/ Cole, a part of Cengage Learning, Inc. Reproduced by permission. www.cengage.com/permissions

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Similar questions

Given your understanding of Wolff’s Law, what mechanical consideration would be important when designing a bioreactor for osteocyte growth ex vivo?
Turkeys in captivity fed on a grain diet (type of grain unspecified) begin to show abnormal walking and postural behaviors such as staggering, and paralysis of neck and other appendages. You humanely euthanize the captive flock and conduct necropsies. Individuals show presence of irregularly shaped white patches in both skeletal and cardiac muscle. Based on this information, what modification to the diet would you suggest to improve the health of future captive turkeys? Select one: a. Increase tocopherol b. Increase iron c. Increase calcium d. Add Acetyl-CoA e. Increase carbohydrates
Hydroxyapatite is the crystalline molecular structure that gives all bones their hardness. Explain how this fact is related to the fact that osteoclasts can increase the amount of calcium in the blood by becoming more active?
Tension (stretching) of bone is most resisted by the: osteons trabeculae osteocytes O collagen fibers O hydroxyapatite Question 5 The articular surfaces of long bones contain a layer of connective tissue. dense irregular O elastic O hyaline cartilage dense regular
The body mass index B of a person of mass m kg and height h meters is given by the formula B(m,h)=m/h^(2).One child increased his previous height of 1.2 meters by 3 centimeters, and his mass increased from 29 kg to 32 kg. Use the differential to estimate how much the child's body mass index has changed.
An individual fractures the right femur. The doctor instructs the individual to use crutches for 7 weeks and to avoid placing any weight on the fractured right femur. How would bone cell activity in the opposite leg change over the 7 week periord? Be sure to include at least 2 different bone cells in your explanation.
Pt is a 67 y.o female as documented in addition to chronic smoking and malnutrition, she initially substained a right intertrochanteric hip fracture which was treated with intranadullary nailing last year. This unfortunately went on to a aseptic nonunion with subsequent screw cut out. Pt than underwent conversion to hemiarthroplasty complicated by distal femur fracture which was treated by ORIF of the distal femur. Pt was discharged to a rehab facility on chronic ceftriaxone with the plan for life long chronic suppression. Altered mental status and hypertension and leukocytesis. UA was suspicious to possible UTI. CT shows no obvious evidence but chronic perioslitis of her proximal femur. Risks for fall, left risk restriction, thrombocytosis, asymptomatic pyuria, lactic acidosis, chronic back pain, CVA with dysphasia presenting for septic shock, COPD, anxiety, depression, anemia, opioid use, smoking, Encephalopathy. At 8:30am pain was 7/10 and at 11:45am pain was 5/10. Base on the…
Pt is a 67 y.o female as documented in addition to chronic smoking and malnutrition, she initially substained a right intertrochanteric hip fracture which was treated with intranadullary nailing last year. This unfortunately went on to a aseptic nonunion with subsequent screw cut out. Pt than underwent conversion to hemiarthroplasty complicated by distal femur fracture which was treated by ORIF of the distal femur. Pt was discharged to a rehab facility on chronic ceftriaxone with the plan for life long chronic suppression. Altered mental status and hypertension and leukocytesis. UA was suspicious to possible UTI. CT shows no obvious evidence but chronic perioslitis of her proximal femur. Risks for fall, left risk restriction, thrombocytosis, asymptomatic puria, lactic acidosis, chronic back pain, CVA with dysphasia presenting for septic shock, COPD, anxiety, depression, anemia, opioid use, smoking, Encephalopathy. Please do a concept map on this pt
The periosteium of the bone contains two layers, the fibrous layer and the cellular layer. What is true about the the fibrous layer of the periosteum? O It provides attachement for muscles and tendons O The periosteum attaches muscle to the bone by Sharpey's fibers It is composed of dense irregular connective tissue All of the answers are correct
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24. A rare genetic disorder called receptor deficit rickets results in the absence of a working receptor for the active form of Vitamin D in tissues. This lack of receptor results in the "message" of vitamin D being lost. What impacts on bone formation would you predict from this disorder? (check all that apply) Group of answer choices fewer materials for building bone would be delivered via the nutrient artery upregulation of Ca+2 transporters would be limited Ca+2 absorption would be impacted bone density would be decreased chondrocytes would be prevented from creating an alkaline environment osteoclast activity would be suppressed, limiting remodeling