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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. Serve as bone to bone connectors

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

3. Define the boundaries of a single sacromere and anchor the thin filaments

4. State of partial contraction

5. Chains of actin molecules

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

7. Occurs by either endochondral ossification or by intramembranous ossification

8. Centers that can issue somatic motor commands as a result of processing performed at the unconscious - involuntary level

9. HGb-like protein found in muscle tissue -has a high oxygen affinity and maintains the oxygen supply in muscles by bind oxygen tightly

10. Existing cartilage is replaced by bone

11. Advance principally by the action of muscles on a hydrostatic skeleton

12. Cells responsible for synthesizing cartillage

13. Occurs when both ends of the muscle are fixed and no change in length occurs during the contraction - but the tension increases

14. Stimulated by a message from the somatic nervous system sent via a motor neuron

15. Skeletal muscle - smooth muscle - and cardia muscle

16. Muscle tissues of the heart

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

18. Spans the entire length of the thick filaments and any overlapping portions of the thin filaments

19. Inactive and infiltrated by adipose tissue

20. The response of a single muscle fiber to a brief stimulus at or above the threshold stiulus - and consists of a latent period - a contraction period - and a relaxation period

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

22. Point of attachment of a muscle to a stationary bone (the proximal end in limb muscles)

23. Dense bone that does not appear to have any cavities when observed with the naked -bony matrix is deposited in structural units called osteons

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

25. Much less dense and consists of an interconnecting lattice of bony spicules

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