According to the sliding filament theory: a. The tension increases linearly as actin-myosin overlap increases O b. All of these Oc. The interference between actin filaments reduces ability of crossbridges to develop tension O d. The active force development in the sarcomere depends on actin-myosin overlap Oe. A zero tension is developed when no overlap between actin and myosin

According to the sliding filament theory: a. The tension increases linearly as actin-myosin overlap increases O b. All of these Oc. The interference between actin filaments reduces ability of crossbridges to develop tension O d. The active force development in the sarcomere depends on actin-myosin overlap Oe. A zero tension is developed when no overlap between actin and myosin

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter8: Muscle Physiology

Section: Chapter Questions

Problem 12RE

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Similar questions

After death, a person no longer makes ATP, so calcium stored in the sarcoplasmic reticulum diffuses down its concentration gradient into the muscle cytoplasm. This result is rigor mortis----an unbreakable state of muscle contraction that stiffens the body for a few days until muscles begin to decay. Explain why this contraction occurs.
Watch this video (http://openstaxcollege.org/l/micromacro) to learn more about macro- and microstructures of skeletal muscles. (a) What are the names of the junction points between sarcomeres? (b) What are the names of the subunits within the myofibrils that run the length of skeletal muscle fibers? (c) What is the â€œdouble strand of pearlsâ€� described in the video? (d) What gives a skeletal muscle fiber its striated appearance?
The release of calcium ions initiates muscle contractions. Watch this video (http://openstaxcollege.org/l/calciumrole) to learn more about the role of calcium. (a) What are â€œT-tubulesâ€� and what is their role? (b) Please also describe how actin-binding sites are made available for cross-bridging with myosin heads during contraction.
The _____ is the basic unit of muscle contraction. a. myofibril b. sarcomere c. muscle fiber d. myosin filament
After death, calcium pumps no longer function and the calcium ion concentration of muscle fiber cytoplasm increases. The result is rigor mortis a state or postmortem muscle contraction. Explain why this contraction occurs and why it ends only when myosin heads begin to break down.
Every skeletal muscle fiber is supplied by a motor neuron at the NMJ. Watch this video (http://openstaxcollege.org/l/skelmuscfiber) to learn more about what happens at the neuromuscular junction. (a) What is the definition of a motor unit? (b) What is the structural and functional difference between a large motor unit and a small motor unit? Can you give an example of each? (c) Why is the neurotransmitter acetylcholine degraded after binding to its receptor?
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In sarcomeres, phosphate-group transfers from ATP activate _______. a. actin b. myosin c. troponin d. Z bands
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