{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Answer false topic bone replacement 31 the bone

Info icon This preview shows pages 5–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Answer: FALSE Topic: BONE REPLACEMENT 31) The bone tissue of the distal region of the femur is replaced about every 4 months, whereas some regions of the shaft of the femur may never be replaced. Answer: TRUE Topic: BONE REPLACEMENT 32) A Colles' fracture involves the distal end of the lateral forearm bone (radius). Answer: FALSE Topic: FRACTURE AND REPAIR OF BONE 33) Limb buds appear at about the tenth week of fetal development. Answer: FALSE Topic: DEVELOPMENTAL ANATOMY OF THE SKELETAL SYSTEM 34) At birth, all bones are cartilaginous. Ossification occurs only after birth. Answer: FALSE Topic: DEVELOPMENTAL ANATOMY OF THE SKELETAL SYSTEM 35) Osteopenia is a decrease in bone mass below normal, as occurs in osteoporosis. Answer: TRUE 5
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Topic: APPLICATIONS TO HEALTH 36) Diagram a typical mature long bone in sagittal section. Label the regions and tissues and identify the sites for red and yellow marrow. Answer: See Figure 5.1. Topic: ANATOMY OF A BONE ESSAY. Write your answer in the space provided or on a separate sheet of paper. 37) Briefly describe the structure and function of each of the four zones of cartilage of the epiphyseal plate. Answer: 1. Resting: small, scattered chondrocytes; anchors the plate to the epiphysis 2. Proliferating: stacks of chondrocytes divide and replace dead cells, leading to growth in length 3. Hypertrophic: columns of larger chondrocytes; maturation of cells from (2) above 4. Calcified: thin layer of dead cells in calcified matrix; attaches plate to bone of diaphysis Topic: BONE GROWTH 38) What factors are necessary for normal bone growth and replacement? Answer: Dietary factors: minerals (calcium, phosphorus, magnesium, iron, fluoride, iron, manganese) and vitamins ( A, B 12 , c, d, and K) Hormonal factors: e.g. sex hormones, insulin, human growth hormone, thyroid hormone, calcitonin, and parathyroid hormone Mechanical stress: e.g. exercise Topic: BONE REPLACEMENT 39) Describe the steps in fracture repair. Answer: 1. A clot called a fracture hematoma develops and some bone cells die. Swelling and inflammation occur. Phagocytes and osteoclasts begin the removal of the damaged tissue. This may take up to several weeks. 2. The fracture hematoma is converted into a connective tissue procallus. Fibroblasts and osteoprogenitor cells invade the procallus and produce collagen and cartilage, converting the procallus into a fibrocartilaginous callus that lasts about 3 weeks. 3. Osteoblasts develop and begin producing spongy bone tissue, thus converting the callus into a bony callus which lasts 3 to 4 months. 4. The process of remodeling removes remaining dead fragments and produces compact bone tissue at the periphery of the fracture site. Topic: FRACTURE AND REPAIR OF BONE SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern