11/5/14 F2F a and p The Muscular System Skeletal Muscle Tissue 1. Fill in the characteristics of the three muscle types Muscle TypeCardiacSkeletalSmoothShape of cellBranching chains of cells, uni or bi nucleated striations nucleus in center lots of mitochondria intercalated discs - 2 parts Gap junctions and desmosomeSingle, very long cylindrical, multinucleated cells with obvious striations (nucleus at periphery) lots of mitochondriaSingle, spindle shaped cells (thick in the middle and tapered at the end), uninucleated (in the center) little mitochondria dense bodies of nucleiStriationsControl 2. What attaches muscles to bone __tendons___________________. 3. The whole muscle is composed of muscle cells (fibers) grouped in bundles called ____ fascicles __________. 4. Name the connective tissue coverings surrounding the following Whole muscle ____ Epimysium ______________ Fascicles ____ Perimysium ______________ Muscle cell ________ Endomysium __________ 5. Match the following three terms with their definitions Sarcolemma - endoplasmic reticulum in muscle cell Sarcoplasmic reticulum - intracellular fluid around organelles Cytosol - plasma membrane of muscle cell 6. Match the following three terms with their definitions Terminal cisternae - T-tubule 2 terminal cisternae T-tubules - part of sarcolemmacarries action potential Triad - part of sarcoplasmic reticulumstores calcium ions 7. Myofibrils consist of contractile proteins called _____ Myofilaments ______________. Name the two types and what theyre composed of ____ thin filament ___________ composed of ______ The protein Actin _____________ _______ thick filament ________ composed of _____ The protein myosin. ______________ 8. Arrangement of myofilaments. Give the letter name of each band Dark band ( _ A __ band Light band ( _ I __ band Match two definitions with each band The I band - contains only thin filaments The A band - contains both thick and thin filaments The A band - defined by length of thick filament The I Band - defined as distance between two thick filaments 9. Define the following terms Z line (disc) ____ A protein disk which anchors thin filaments and connects adjacent myofibrils. _________________________________________________ H zone ___ The region between the thin filaments In the A band. ______________________________________________________ 10. What happens to these areas during contraction Z line (disc) _________ It moves closer together. ____________________________________________ H zone _______ The muscles shorten. __________________________________________________ 11. Define these two terms M line ____________ The m line consists of protein fibers that connect neighboring thick filaments. _____________________________________________ Sarcomere _____________ The region of the myofibril between two z lines Contractile unit of the muscle cell. _________________________________________ ________________________________________________________________ 12. Organization of muscle. Put the following components in order, from smallest to largest 4.fascicle smallest is 1 largest is 5 2.myofibril 1.myofilament 5.muscle 3.muscle fiber (cell) The Muscular System Neuromuscular Junction 1. What insulates each muscle cell ______ endomysium___________________ 2. Synaptic vesicles in the axon terminal of a motor neuron contain what neurotransmitter _______ acetylcholine__________________ 3. An action potential in the axon terminal of a motor neuron opens what type of ion channels ________ calcium channels_________________ 4. By what means of membrane transport does the neurotransmitter leave the axon terminal _______ exocytosis__________________ 5. Binding of neurotransmitter to the receptors on the motor endplate open what type of ion channels _________ chemically gated________________ 6. Opening of these channels leads to ____ depolarization ___________ of the motor endplate. 7. How is the neurotransmitter removed from the
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resistance to the contraction of muscles for motility. 3. Many animals have hydroskeletons. a. Hydras use a fluid-filled gastrovascular cavity to support tentacles that rapidly contract. b. Planarians easily glide over substrate with muscular contractions of body walls and cilia. c. Roundworms have a fluid-filled pseudocoelom and move when their longitudinal muscles contracct against it. d. Earthworms are segmented with septa dividing the coelom into compartments; circular and longitudinal muscles contract…
Assignment 1 Assignment 1 FUNCTIONAL ANATOMY & ERGOGENIC AIDS IN SPORT “Research on athlete’s functional anatomy and the ways in which they enhanced their performance with ergogenic aids.” FUNCTIONAL ANATOMY & ERGOGENIC AIDS IN SPORT “Research on athlete’s functional anatomy and the ways in which they enhanced their performance with ergogenic aids.” Geoffrey Chew 12G Geoffrey Chew 12G Contents Question 1 1 Question 2 2 Question 3 4 Question 4 6 Question 1 Lance Armstrong…
The Muscular System Muscles are responsible for body movement There are 3 basic types of muscles: skeletal, cardiac, and smooth A. Function of Muscles 1. Produce movement 2. Maintain posture 3. Stabilize joints 4. Generate heat B. Characteristics of Muscles Are elongated (a muscle cell = a muscle fiber) Contraction of muscles is due to the movement of microfilaments All share the same terminology Myo- = mucle Mys- = muscle Sarco- = flesh Most attached by tendons to bones Cells are multinucleated…
Skeletal System pg. 10 Axial Skeleton - 80 bones Appendicular Skeleton - 126 bones Five types of Bones pg. 11 Long Bones- femur Short Bones- wrist Flat Bones- parietal bone Irregular Bones- vertebrae Sesamoid Bones- patella Test Info Page 6 Anatomy of a Long Bone Friday, October 01, 2010 10:17 PM While observing the long bone complete the following questions: 1. Identify the outstanding visual characteristics observed in the bone's exterior. Make qualitative observations with regard to the…
free travel guide that anyone can edit. Muscle From Wikipedia, the free encyclopedia For other uses of "muscle", see muscle (disambiguation). The lead section of this article may need to be rewritten. Please discuss this issue on the talk page and read the layout guide to make sure the section will be inclusive of all essential details. (January 2010) A top-down view of skeletal muscle Muscle is a kind of soft tissue of animals. Muscle cells contain protein filaments that slide past…
to recognize the definition of a bursa or a tendon sheath. Be able to recognize these structures in diagram 8.4 Bursae--flattened fibrous sacs lined with synovial membrane and containing a thin film of synovial fluid; they occur where ligaments, muscles, skin, tendons, or bones rub together reduces friction by rolling between structures Tendon sheath--elongated bursa that wrap completely around a tendon subjected to friction (like a bun around a hotdog); common where several tendons are crowded…
Functions Transport of gases, nutrients, and waste products Transport of processed molecules Transport of regulatory molecules Regulation of pH and osmosis Maintenance of body temperature Protection against foreign substances Clot formation Composition Plasma 55%, formed elements 45% Plasma Pale yellow, 91% water, 9% other substances Colloid: liquid containing suspended substances that don’t settle out of solution Almost all of the plasma proteins are produced by the liber or blood…
Btec Level: 3 in Health and Social Care Unit 5: Anatomy and physiology for Health and Social Care Assessor: F. Mansell Task2: The main tissue types of the body and the role these play in two named organs of the body. P2: Outline the structure of the main tissues of the body There are many different types of cells in the human body. These cells would not be able to function on their own, they are all part of a large organism that is called - you. The two named organs that I have chosen for…