Reminder: Only click 'Save & Submit' if you are ready to have this question contribute to your final gradeThe multinucleatev muscle fibre shown above is a striatedv cell surrounded by asarcolemmav. Each multinucleatev contains the proteinsv to make the myofilamentv. The alternatingv bands give the cell aappearance. During av contraction, the I band reduces in length whereas thev remains the same length.

Muscles are the structural and functional component of the muscular system and aids in the movement…

Answered: The multinucleate muscle fibre shown…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Similar questions

Myosin's affinity for actin occurs Following the power stroke When myosin is energized When a new ATP molecule associates with myosin Following ADP release Following the release of calcium ions into the sarcoplasm
Arrange the steps of muscle innervation and contraction in response to touching a hot plate. appendage is removed from stimulus v movement is produced muslce fibers work together to produce action muscle contraction occurs and the sarcomere shortens Myosin heads bind thin filament Calcium binds troponin Calcium is released T tubules carry the action potential to the sarcoplasmic reticulum Action potential is generated in the sarcolemma as a result of opened sodium channels The presynaptic cell releases acetylcholine Signal arrives at the neuromuscular junction Sensory receptors detect uncomfortable heat Afferent neurons carry impulse to the central nervous system Signal reaches the reflex arc in the central nervous system and is directed out through the anterior horn Signal travels through the motor units > |> > > |> > > > > > > > >
If Ca2+ pumps of the sarcoplasmic reticula fail to function, what will happen to the tension generated in a single muscle fiber when it is excited? increase in tension decrease in tension no change in tension
The nuclear-bag fibers of muscle spindles are innervated by :-a- Aγ nerve fibersb- Aβ nerve fibersc- Aδ nerve fibersd- Ia nerve fibers
Label the molecular components of the myofilaments from a close up view of a model of a relaxed sarcomere
Muscles relaxatiom occurs when acetylcholine is cleaved from its receptors ,calcium is pulled back into the sarcoplasmic recticulum,the myosin is released from its binding site ,and the muscle fiber returns to its resting lenght true or false
Tropmyosin and Troponin are called the regulatory proteins in muscle contraction. Describe the myofibril organization and specific structural and functional role of these two proteins in muscle contraction-relaxation cycle.
Skeletal muscle cells have the ability to do all of the following EXCEPT _____. activating other muscle cells to contract producing force while shortening responding to chemicals released by nerve cells rebounding to their former length after being stretched
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
Which of the following regions of a sarcomere does not change length during a contraction because it represents the length of the thick myosin filaments. Group of answer choices Z disk H band A band I band
During muscle contraction, the ion that leaks out of the sarcoplasmic reticulum and induces myofibrils to contract is O Na+. O Mg2+. O Cksup>-. O K+. O Ca2+.
The size principle requires that the muscle fibers controlled by a single motor unit are all the same fiber type True False

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