Test your basic knowledge |

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. Occurs whne a muscle shortens against a fixed load while the tension on that remains constant






2. Cells responsible for synthesizing cartillage






3. 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






4. 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






5. 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






6. Units of diveded myofibrils






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






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






9. The primary source of energy for muscle contraction






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






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






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






13. Striations of light and dark bands of skeletal muscle






14. Refers to a bending of a joint






15. Large - multinucleated cells involved in bone resorption






16. The region containing thin filaments only






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






18. Concentric circles of bony matrix






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






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






21. Involved in blood cell formation






22. The basic framework of the body - consisting of the skull - vertebral column - and the rib cage






23. Region containing thick filaments only






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






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






26. Skeletal muscle - smooth muscle - and cardia muscle






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






28. Inactive and infiltrated by adipose tissue






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






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






31. 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






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






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






34. Time between stimulation and the onset of contraction






35. Serves as the framework within all vertebrate organisms






36. Occurs by either endochondral ossification or by intramembranous ossification






37. 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






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






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






40. Indicates a straightening of a join






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






42. State of partial contraction






43. Muscle tissues of the heart






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






45. Serve as bone to bone connectors






46. Composed of thin and thick filaments






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






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






49. Link between the nerve terminal (synaptic bouton( and the sarcolemma of the muscle fiber






50. Composed of organized bundles of myosin molecules