8) Red bone marrow cavity contains a large percentage of A) hyaline cartilage C)
ID: 3514838 • Letter: 8
Question
8) Red bone marrow cavity contains a large percentage of A) hyaline cartilage C) elastic tissue B) fat (adipose tissue) D) hematopoietic tissue 9) Which hormone increases osteoclast activity to release more calctum ions into the bloodstream? A) calcitonin C) estrogen B) parathyroid hormone D) thyroxine 10) Which of the following is not a function of the skeletal system (-skeleton)? A) support C) storage of calcium and phosphates B) communication D) production of blood cells (hematopoiesis) 11) Layers of compact bone extracellular matrix with highly oriented collagen fibers and that are concentric to the central canal of the osteon are named A) Lamellae B) Periosteum C Trabeculae D) Endosteum 12) The relaxation of skeletal muscle fibers depends on the activity of thewhich decreases the concentration of in the cytosol. A) Ca ion channels; Ca(cations) C) Ca pumps; Ca(cations) B) Glucose carriers; Glucose D) Na-K pumps, K(cations)Explanation / Answer
Answer 8- Red bone marrow cavity contains a large percentage of hematopoietic tissue.
Answer 9- Calcitonin increase the osteoclastic activity to release more calcium into the blood stream.
Answer 10- Communication is not the function of skeletal system. All other given option is function of skeletal system.
Answer 11- Layers of compact bone extracellular matrix with highly oriented collagen fibers and that are concentric to central canal of the osteon are named endosteum.
Answer 12- The relaxation of skeletal muscle fibers depend on the activity of the Ca ion channels which decrease the concentration of Ca in the cytosol.
Answer 15- the tension generated in a skeletal muscle fiber is directly proportional to the number of cross bridges that may interact with the myofilaments.
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