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






2. 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






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






4. Muscle tissues of the heart






5. Region containing thick filaments only






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






7. Large - multinucleated cells involved in bone resorption






8. Units of diveded myofibrils






9. Composed of thin and thick filaments






10. Able to provide rapid commands to the skeletal muscles and variious other organs






11. Composed of organized bundles of myosin molecules






12. Inactive and infiltrated by adipose tissue






13. Time between stimulation and the onset of contraction






14. 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






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






16. 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






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






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






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






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






21. The region containing thin filaments only






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






23. Move by beating cilia or flagella






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






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






26. Skeletal muscle - smooth muscle - and cardia muscle






27. Striations of light and dark bands of skeletal muscle






28. Indicates a straightening of a join






29. Attach skeletal muscle to bones and bend the skeleton at the movable joints






30. The primary source of energy for muscle contraction






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






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






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






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






35. Chains of actin molecules






36. Cells responsible for synthesizing cartillage






37. Refers to a bending of a joint






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






39. Serves as the framework within all vertebrate organisms






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






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






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






43. 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






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






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






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






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






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






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






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