Concept explainers
Introduction:
The bone is a form of connective tissue. The bone matrix is produced by the embedded bone cells within it. The main components of bone are the collagen and mineral elements. The collagen fibers provide the matrix with flexible strength, while the mineral elements provide strength for weight-bearing. Bones give shape to the body and perform many other functions.
Answer to Problem 1RAC
The correct answer is option (d) vitamin D storage.
Explanation of Solution
Explanation/justification for the correct answer:
Option (d) vitamin D storage. The bones store some minerals present in the blood. They are released from the bone into the blood if the concentration of these minerals falls. Calcium and phosphorus are the main minerals stored in bone. Vitamin D is a vitamin that is crucial for the absorption of vitamin D which stores in the fat cells of the body. So, the correct answer is option (d) vitamin D storage.
Explanation for incorrect answer:
Option (a) internal support and protection. Bone is the major supporting tissue of the body. It is hard and protects the organs. For example, the rib cage protects the heart, lungs and other organs of the thorax. So, this is an incorrect answer.
Option (b) attachment for the muscles. Skeletal muscles attach to bones through tendons. The contraction of the muscles moves the bones, producing body movements. Joints allow movement between bones. So, this is an incorrect answer.
Option (c) calcium and phosphate storage. The bones store some minerals present in the blood. They are released from the bone into the blood if the blood levels of these minerals fall. Calcium and phosphorus are the main minerals stored in bone essential for many physiological processes. So, this is an incorrect answer.
Option (d) blood cell production. Many bones contain cavities filled with red bone marrow which forms blood cells and platelets. So, this is an incorrect answer.
The bones support the internal organs and attach muscles with tendons. They store essential minerals like calcium and phosphorus and help to produce blood cells and platelets.
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Chapter 6 Solutions
ANAT.+PHYSIO.2-LAB.MAN. >CUSTOM<
- Bone tissue contains ______. a. living cells b. collagen fibers c. calcium and phosphorus d. all of these e. both a and barrow_forwardExplain why bone remodeling is important, and give its stepsarrow_forwardWhich of the following statements about bone tissue is/are TRUE? Group of answer choices a. Spiraling collagen fibers gives bone its tremendous resistance to torsional forces. b. Concentric rings of bone matrix, called lamellae, compose an osteon. c. Bone marrow occurs within the spongy bone and in a central medullary cavity. d. The epiphyseal plate of long bones close during fetal development. e. Calcium phosphate salts crystallize to form the inorganic part of bone. f. Osteoblasts are immature, bone-forming cells. g. Bones are classified by shape: long, short, irregular, or flat. h. The trabeculae of compact bone are arranged in parallel units along the long axis.arrow_forward
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- 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_forwardWhich 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)arrow_forwardWhich is not involved in the process of bone repair following a fracture: A. Fibroblasts produce collagen fibers to connect broken pieces of bone B. A fibrocartilaginous callus serves as a model for new bone growth C. Osteoclasts remove excess bone from the hard callus D. The fracture hematoma reorganizes to form a procallus D. No exceptions; all of the choices are involved in the process of bone repairarrow_forward
- The flexible strength of bone occurs because ofa. osteoclasts.b. ligaments.c. hydroxyapatite.d. collagen fibers.e. periosteumarrow_forward24. Osteoblasts secrete the organic bone matrix called osteoid. It is composed of __________ a. collagen b. ground substance c. hydroxyapatites d. a and b e. a, b, and carrow_forwardWhich of the following is not found in compact bone? A layers of calcium phosphate and collagen fibers surrounding central canals B living cells in tiny pores connected by microscopic channels C canals containing arteries, veins, and nerves D tiny beams of vitamin D surrounded by calcium, osteocytes, and yellow marrowarrow_forward
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