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PCAT Biology Muscles And Locomotion
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PCAT Biology Muscles And Locomotion
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25 Questions

1. Multinucleated cell created by the fusion of several mononucleated embryonic cell

2. The primary source of energy for muscle contraction

3. Time between stimulation and the onset of contraction

4. Skeletal muscle - smooth muscle - and cardia muscle

5. Region containing thick filaments only

6. Responsible for voluntary movements and is innervated by the somatic nervous system

7. Provides channels for ion flow throughout the muscle fibers - and can also propagate an action potential

8. Concentric circles of bony matrix

9. Consists of a central microscopic channel called a Haversian Canal - surrounded by a number of lamellae

10. Capable of propagating an action potential and is connected to a system of transverse tubules (T system) oriented perpendicularly to the myofibrils

11. Involved in blood cell formation

12. Type of dynamic contraction where the muscle fibers shorten and the tension on the muscle increases

13. Cells responsible for synthesizing cartillage

14. Composed of thin and thick filaments

15. Purpose is to convert lactic acid in the liver to glucose for discharge into the bloodstream during period of strenuous activity

16. Inactive and infiltrated by adipose tissue

17. The cavities in between the spicules are filled with yellow or red bone marrow

18. Striations of light and dark bands of skeletal muscle

19. Refers to a bending of a joint

20. Modified endoplasmic reticulum that stores calcium ions that envelop myofibrils

21. A hard skeleton that covers all muscles and organs of some invertebrates -found principally in arthropods -composed of noncellular material secreted by the epidermis

22. Type of dynamic contraction where the muscle fiber lengthens and the tension on the muscle increases

23. Responsible for involuntary actions and is innervated by the autonomic nervous system -found in the digetive tract - bladder - uterus - and blood vessel walls - among other places

24. Serves as the framework within all vertebrate organisms

25. Condition where the muscles contract and become rigid - even without action potentials which is caused b an absence of adenosiine triphosphate - which is required for the myosin heads to be released from the actin filaments

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