Which of the following is NOT a way intermediate filaments are unique compared to the other cytoskeletal filaments? intermediate filaments rely on accessory proteins for their function intermediate filaments can be found inside the nucleus intermediate filaments are made from fibrous protein subunits intermediate filaments do not have structural polarity intermediate filaments do not interact with motor proteins

Which of the following is NOT a way intermediate filaments are unique compared to the other cytoskeletal filaments? intermediate filaments rely on accessory proteins for their function intermediate filaments can be found inside the nucleus intermediate filaments are made from fibrous protein subunits intermediate filaments do not have structural polarity intermediate filaments do not interact with motor proteins

Anatomy & Physiology

1st Edition

ISBN:9781938168130

Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble

Publisher:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble

Chapter10: Muscle Tissue

Section: Chapter Questions

Problem 8RQ: Depolarization of the sarcolemma means ________. the inside of the membrane has become Less negative...

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The _____ is the basic unit of muscle contraction. a. myofibril b. sarcomere c. muscle fiber d. myosin filament
Depolarization of the sarcolemma means ________. the inside of the membrane has become Less negative as sodium ions accumulate the outside of the membrane has become less negative as sodium ions accumulate the inside of the membrane has become more negative as sodium ions accumulate the sarcolemma has completely lost any electrical charge
Which of the following does NOT limit normal clot growth to the sight of injury? O A) Removal and dilution of clotting factors O B) Fibrin binding to thrombin O C) Antithrombin III D) Exposed collagen fibers O E) Serotonin
Compared to skeletal muscle, smooth muscle None of the choices are correct Has equal thick and thin filaments Uses calcium from the extracellular fluid only Has the same contractile and regulatory proteins. Has much more thick filaments than thin filaments
Which of the following statements are true? (choose all that apply) The Z-disc is found in the middle of an l-band Myosin are known as the thick filaments The A-band is seen as "dark" under the microscope Tropomyosin is on the Actin filament During a muscle contraction, the sarcomeres move farther apart A sarcomere is located from one H-zone to the following H-zone
The mechanism of contraction in smooth muscle is different from skeletal muscle in that the site of calcium binding differs ATP energizes the sliding process actin and myosin interact by the sliding filament mechanism the trigger for contraction is a rise in intracellular calcium the thick filaments have fewer myosin heads
Actin filaments in microvilli require the help of myosin so that they can associate with the microvilli cellular membrane. What type of myosin is utilized for membrane association? Myosin VII Myosin II O Myosin I O Myosin VI
Which of the following shortens in length during skeletal mucle contraction? select all that apply Action filaments H- zone A- band I- band
Which of the following proteins connects the actin filaments to the Z-band in the sarcomere? CapZ Titin Profilin Nebulin O Tropomodulin < Previous
Light less dense area of sarcomere that contains reminder of thin filaments but no thick filaments is called
Using the sliding filament theory, explain (or draw) the process of sarcomere shortening. Start from the point where calcium would interact with troponin. Make sure to discuss the roles of actin, myosin, and ATP.
ATP within actin subunits is hydrolyzed after assembly into a filament but before disassembly from a filament. in theprocess of assembly into a filament. in the process of disassociation from a filament after disassociation from a filament