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PCAT Biology Muscles And Locomotion

Subjects : pcat, biology
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Capable of propagating an action potential and is connected to a system of transverse tubules (T system) oriented perpendicularly to the myofibrils






2. Inactive and infiltrated by adipose tissue






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






4. Amoeba use for locomotion where the advancing cell membrane extends forward






5. Cells responsible for synthesizing cartillage






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






7. 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






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






9. Refers to a bending of a joint






10. Striations of light and dark bands of skeletal muscle






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






12. Contraction that becomes continuous when the stimuli are so frequent that the muscle can't relax and is stronger than a simple twith of a single fiber






13. Type of connective tissue that is softer and more flexible than bone -retained in adults in places where firmness and flexibility are needed






14. Muscle tissues of the heart






15. Point of attachment of a muscle to the bone that moves (distal end in limb muscles)






16. Move by beating cilia or flagella






17. Region containing thick filaments only






18. Occurs by either endochondral ossification or by intramembranous ossification






19. Chains of actin molecules






20. Concentric circles of bony matrix






21. When fibers of a muscle are expoed to a very frequent stimuli - the muscle can't fully relax and the contractions begin to combine - becoming stronger and more prolonged






22. Composed of organized bundles of myosin molecules






23. Serve as bone to bone connectors






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






25. The primary source of energy for muscle contraction






26. Includes both concentric and eccentric types of contractions -results in the chang in length of the muscle with a corresponding change in tension on that muscle






27. Runs down the center of the sarcomere






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






29. Units of diveded myofibrils






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






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






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






33. The region containing thin filaments only






34. Mesenchymal (embryonic or undifferentiated) connective tissue is transformed into - and replaced by - bone






35. Involved in blood cell formation






36. After the contraction period - this is a brief relaxation period in which the muscle is unresponsive to a stimulus






37. Achieve movement by means of the power stroke -a thrusting movement generated by the sliding action of microtubules






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






39. Muscles contract against the resistance of the incompressible fluid within the animal's tissues (this fluid is termed the hydrostatic skeleton)






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






41. Serves as the framework within all vertebrate organisms






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






43. Skeletal muscle - smooth muscle - and cardia muscle






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






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






46. State of partial contraction






47. In vertebrates and some invertebrates - particularly echinoderms - energy can be temporarily stored in a high-energy compound






48. Synthesize and secrete the organic constituents of the bone matrix; once they have become surrounded by their matrix - they mature into osteocytes






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






50. Composed of thin and thick filaments






Can you answer 50 questions in 15 minutes?



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