bone (supportive)characteristics; composition—blood (fluid)matrix, formed elements, transportsMusclevascularity: verycontractile proteinstypes: skeletal, cardiac, smoothNervousneurons: functional (soma, axon, dendrites)
Cells, Tissues, Bones, & Musclesneuroglia cells: supportiveBONESBones:functions:—support—protect—movement—store—hematopoietic tissue (blood cell formation)red marrow (newborns/adults)chemical composition:—organics:osteo- cytes/blasts/clastsglycoproteinscollagen fibers—inorganics:hydroxyapaptitesCa+carbonateions—combo durable/strong, not brittledeposition—injury/reinforcement—dietary requirements—alkaline phosphataseCalcium—functions in body:nerve impulsesmuscle contractionblood coagulationsecretions (glands/nerve cells)cell division—hormonal mechanism (rise/fall blood Ca+)H.I.—rickets, osteoporosis, osteopetrosis
Cells, Tissues, Bones, & MusclesMUSCLESMusclestissues—skeletallongest, striated, voluntary (exceptions), adaptable—cardiacheart walls, striated, involuntary—smoothvisceral organ walls, non-striated, involuntaryfunctions:—movementskeletal muscle (somatics)cardiac muscle (blood vessels)smooth muscle (longitudinal, circular, diagonal)—posture (gravity)—stabilizing/strengthening joints—heat (contractions)Skeletal Musclesfunctionsnerve and blood supply—each muscle by one V.A.N.—myoneural junctionsExcitation:o1. action potential axon terminal of motor neurono2. Ca+enters terminal ACho3. ACh vessels bind to terminal end ACh diffuse through synaptic clefo4. ACh bind to sarcolemma receptors t-tubules enter sarcoplasm—lots of energy (many mitochondria)—blood supply delivers:
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- Fall '08