Summary Holes Anatomy and Physiology final Exam (Answered)

Holes Anatomy and Physiology final Exam (Answered) What are the functions of the skeletal system? -protect soft tissue -provide attachment for muscles -store inorganic salts -exchange gases for the body What is the definition of hematopoiesis? the process of blood cell formation What vitamin is necessary for proper absorption of calcium in the small intestines? vitamin d What cell found in bone functions to deposit bony matrix, resulting in the growth of bone tissue? osteoblast describe osteblasts -bone-building cells -involved with bone deposition -these cells should become more active when blood calcium levels are high -calcitonin causes these cells to become more active describe osteoclasts -bone resorbing cells -parathyroid hormone cells to become more active -massive multinucleate cells describe osteocytes bone cells encased in matrix intramembranous ossification -parietal bones -bones form between sheetlike layers of connective tissue -occipitcal bone -compact-spongy-compact sandwich temporal bone scapula true ribs spinous process of thoracic vertebra lacrimal bone foramen magnum head of humerous infraspinous fossa ulna mental foramen sacrum lambdoid suture tibial tuberosity freely movable Diarthrotic joints are immovable Synarthrotic joints are slightly movable Amphiarthrotic joints are menisci Fibrocartilage discs within joint bursae Fluid-filled sacs synovial membrane Lining of joint cavity; secretes fluid articular cartilage Protective layer the covers bone ends pivot joint ball and socket joint saddle joint hinge joint condylar joint flex When you reach up to scratch your nose, you have to _______ your elbow. flex flex When you sit in a chair with your feet on the floor, you have to _______ your hips and ______ your knees. abducting adducting Doing jumping jacks requires that you alternate ______ and _______ your lower extremities. muscle fascile muscle fiber myofibril myofilaments Place in order from largest to smallest the components of a skeletal muscle sarcoplasmic reticulum Site for storage of calcium myofibril Threadlike bundles of thick and thin filaments sarcolemma Plasma membrane of muscle fiber sarcoplasm Cytoplasm of muscle fiber mitochondria Site of ATP production sarcomere Functional unit of contraction within muscle fiber