19. The function of transverse (T) tubules A. They store calcium B. They provide elasticity to the muscle C. They hold the thick filaments to the Z line D. Actin and myosin are synthesized in the T tubules E. They conduct action potentials from the sarcolemma to the interior of the muscle cell F. they surround the muscle fiber to increase the surface area for more binding to neurotransmitters

19. The function of transverse (T) tubules A. They store calcium B. They provide elasticity to the muscle C. They hold the thick filaments to the Z line D. Actin and myosin are synthesized in the T tubules E. They conduct action potentials from the sarcolemma to the interior of the muscle cell F. they surround the muscle fiber to increase the surface area for more binding to neurotransmitters

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter6: The Muscular System

Section: Chapter Questions

Problem 6SQ: Nerve impulses first stimulate a skeletal muscle fiber at _______. a. T tubules b. sarcomeres c....

See similar textbooks

Similar questions

Figure 38.37 Which of the following statements about muscle contraction is true? The power stroke occurs when ATP is hydrolyzed to ADP and phosphate. The power stroke occurs when ADP and phosphate dissociate from the myosin head. The power stroke occurs when ADP and phosphate dissociate from the actin active site. The power stroke occurs when Ca2+ binds the calcium head.
A muscle that has a pattern of fascicles running along the long axis of the muscle has which of the following fascicle arrangements? circular pennate parallel rectus
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.
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.
Nerve impulses first stimulate a skeletal muscle fiber at _______. a. T tubules b. sarcomeres c. neuromuscular junctions d. actin binding sites
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.
The _____ is the basic unit of muscle contraction. a. myofibril b. sarcomere c. muscle fiber d. myosin filament
Which is moved the least during muscle contraction? the origin the insertion the ligaments the joints
The diaphragm is a ______ muscle. a. smooth b. skeletal c. dome-shaped d. a and c
You are training athletes for the 100-meter dash. They need muscles specialized for speed and strength, not endurance. What muscle characteristics would your training regimen aim to develop? How would you alter it to train a long-distance swimmer?
The cell membrane of a muscle fiber is called ________. myofibril sarcolemma sarcoplasm myofilament
Skeletal muscle contraction requires _________. a. calcium ions b. ATP c. arrival of a nerve impulse d. all of the above