Exam 2 Study Guide!!!!!REAL ONE.docx - Anatomy and...

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Anatomy and Physiology IExam 2 Study Guide, Chapters 6-8Exam Date 10/15/18 @ 9:00amThings to know….Chapter 6.Bones and Bone Tissue LectureGeneral Functions of the Skeletal SystemoSupportoProtection- skull around brain; ribs, sternum, vertebrae protect organs of thoraciccavityoMovement- produced by muscles on bones, via tendons.Ligaments allow some movement between bones but prevent excessivemovementoStorage- Ca and Phosphate. Stored then released as needed. Fat stored inmarrow cavitiesoBlood cell production- bone marrow that gives rise to blood cells and plateletsKnow the difference between osteoblasts, osteoclasts, and osteocytesoOsteoclasts:resorption of boneoOsteocytes: mature bone cells. Stellate. Surround by matrix, but can make smallamounts of matrix to remain itLacunae: spaces occupied by osteocyte cell bodyCanaliculi: canals occupied by osteocyte cell processNutrients diffuse through tiny amount of liquid surrounding cell and fillinglacunae and canaliculi. Then can transfer nutrients from one cell to thenext through gap junctionsoOsteoblasts: formation of bone through ossification or osteogenesis. Collagenproduct by E.R and golgi. Released by exocytosis. Precursors of hydroxyapatitestored in vesicles then released by exocytosisOssification: formation of bone by osteoblastOsteoblasts communicate through gap junctions. Cells surroundthemselves by matrixWhat is cancellous (spongy bone) and compact bone? How are they different?
oCovered with endosteumoOriented along stress linesTrabeculae looks like thin threadsNot as heavy as the osteons of the compact bonesFormation of the trabeculae always depends on which of these boneswere mechanically tensionedCan be found in the head part of the long bonesIt fills up the bones of an irregular typeoCompact bone:Heavy, extremely rough and are formed or stacked in layers

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Term
Spring
Professor
Erin Marie Williams-Hatala
Tags
LIGAMENTS, Bone Tissue Lecture

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