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- Which of these does not promote bone deposition? a. Dietary calcium b. Vitamin D c. Parathyroid hormone d. Calcitonin e. TestosteroneWhich substance stimulates bone reabsorption? a. Osteoprotegerin (OPG) and estrogen b. Prostaglandin E2 (PGE2) and tumor necrosis factor-a (TNF-a) c. Osteoprotegerin (OPG) and tumor necrosis factor-a (TNF-a) d. Prostaglandin E2 (PGE2) and estrogenWhich substances inhibit bone reabsorption? a. Osteoprotegerin (OPG) and estrogen b. Prostaglandin (PGE2) and tumor necrosis factor-a (TNF-a) c. Osteoprotegerin (OPG) and tumor necrosis factor-a (TNF-a) d. Prostaglandin (PGE2) and estrogen
- How do calcitonin or parathyroid hormone control blood calcium levels? A. Calcitonin acts to increase blood calcium levels B. Parathyroid hormone release is inhibited by increased calcium levels C. Parathyroid hormone stimulates bone resorbing cells to take up calcium D. Calcitonin inhibits parathyroid hormonrCompact bone comprises approximately 80% of the skeleton? A. True B. FalseSelect the bone disorder in which bone resorption outpaces bone deposit, leaving the person with thin and often very fragile bones? a.osteoporosis b.osteomalacia c.Paget's disease d.rickets
- What can a deficiency of growth hormone during bone formation cause? a.increased osteoclast activity b.decreased osteoclast activity c.decreased epiphyseal plate activity d.inadequate calcification of boneWhich hormone might be found in high concentrations in the hypophyseal portal veins? A. growth hormone releasing hormone (GHRH) B. oxytocin C. both growth hormone releasing hormone (GHRH) and oxytocin growth hormone (GH)Osteoporosis is a loss of bone density that can be caused by low concentrations of calcium in bones. Abnormal bone calcium is MOST likely caused by dysregulation of which organ? A. adrenal gland B. pancreas C. parathyroid gland D. thymus
- The activation of osteoblasts is an activity stimulated by parathyroid hormone a. true b. falseThe thyroid stimulated to secrete thyroid hormone by a stimulating hormone released by which gland or glands?A. Pituitary gland B. Pancreas . C. Parathyroid D. Adrenal glandsOsteoporosis is a condition where bones become weak and brittle. It is caused by an imbalance in the activity of which cells? a. osteoclasts and osteoblasts b. osteoclasts and osteocytes c. osteoblasts and chondrocytes d. osteocytes and chondrocytes