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Virginia Tech - BIOL 1106 - Class Notes - Week 7

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Schools > Virginia Polytechnic Institute and State University > OTHER > BIOL 1106 > Virginia Tech - BIOL 1106 - Class Notes - Week 7

Virginia Tech - BIOL 1106 - Class Notes - Week 7

School: Virginia Polytechnic Institute and State University
Department: OTHER
Course: Principles of Biology
Professor: Jackson Evans
Term: Spring 2017
Tags: anatomy and Biology
Name: Lesson 12 Notes
Description: This covers the skeletal and muscular systems of the human body. These notes are for lesson 12 which is including in the third exam of Biology 1106.
Uploaded: 03/05/2018
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Join more than 18,000+ college students at Virginia Polytechnic Institute and State University who use StudySoup to get ahead
School: Virginia Polytechnic Institute and State University
Department: OTHER
Course: Principles of Biology
Professor: Jackson Evans
Term: Spring 2017
Tags: anatomy and Biology
Name: Lesson 12 Notes
Description: This covers the skeletal and muscular systems of the human body. These notes are for lesson 12 which is including in the third exam of Biology 1106.
Uploaded: 03/05/2018
5 Pages 44 Views 35 Unlocks
  • Better Grades Guarantee
  • 24/7 Homework help
  • Notes, Study Guides, Flashcards + More!

Unformatted text preview: How do animals move ? Tesson 12 types of skeletons hydrostatic skeletons soft bodies terrestrial and aquatic invertebrates exoskeletons - rigid outer covering, made of chitin arthropods endoskeletons - rigid Internal elements kechinoderms and vertebrates cells involved in bone development undifferentiated mesenchymal cells osteocast formed from fibroblast osteoblast chondroplast chondrocyte Osteocyte collagen (fibrou tissue) cartilage - specialized connective tissue matrix.ground substance (Chondroitin) + collagen fibers cells chondrocytes withstand compression and tension Joins and in between pones bone - Specialized connective tissue organic + inorganic substances matrix-conagen + ground substance (hydroxyapatite), equal in volume - cells osteocytes 3 categories of bone based on density compact, medumiary, spongy outer port of shaft shaft epiphysisEndochondrial bone development * cartilaginous models bone added to outside cartilage replaced with bone * Tengthening occurs at golphyseal growth plates Stops in jare adolescence in humans bone remodeling response to use or diuse osteoblast deposiis new bone Osteoclasts a reabsorbing established bone Joints and steletal movement Joints powered by muscle ball and cocct allow greatest Movement, hip and shoulder . hinge : only movement forward/backward, Khce, elkow, fingers gliding sliding of one surface to another, between vertebrac, hand combination rotation and side to side, jaw antagonistic muscles - flexor and extensor of the reg flexors - hamstrings backward extensors - quadriceps forward muscle 1Npes smooth skeittai, cardiac internal orqon attach to tone heartStructure of vertelerate skeletal muscle Loone- 'myotibrils contraction of skeletal muscles tendon skeletal muscle bundle of musue fibers nuclei strations Le plasma membrane e myotllament myotkril muscle fiber (cell) s sarcomeres myofibrils have alternating light and dark bandss sarcomeres shorten during muscle contraction is Hpond Iband Hband Hband Hband band MILIUI 2 line A band 2line band A band Sar comere Sarcomere relaxed sarcomere sarcomere contracted

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