Describe what is happening overall in the first sentence. Then describe, in detail, what is happeningin each step below. Include details about what is happening at steps 5 - 7 in terms of calcium andthe contraction mechanism (from a different figure).(a)-Axon terminal ofsomatic motor neuronMuscle fiberACh-potentialActionNa+Action potential--Motor end plate-lellCa2+releasedMyosin thick filament6+ + +++

The muscle contraction is achieved by the interaction between actin and myosin filaments. This…

Answered: Describe what is happening overall in…

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

Humming birds and rattlesnakes can contract and relax skeletal muscle very quickly, i.e. in 10-20 milliseconds. Which of the following steps must they have shortened to speed up contractions? more brief neuronal action potentials more brief skeletal muscle attion potentials shorter duration of calcium in the cytosol all of the above
Which statement or statements describe why depletion of ATP after death leads to rigor mortis? Select all that apply. ATP is required to move tropomyosin back over the active sites of thin filaments. ATP is required for myosin thick filaments to detach from actin thin filaments. ATP is required to pump calcium back into the sarcoplasmic reticulum. ATP is required for the action potential to spread across the sarcolemma.
Describe in details the biochemical and mechanochemical series of events that enables motor neurons to trigger muscle contraction, using the biceps brachii as an example.
Put these events in the correct order
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 > |> > > |> > > > > > > > >
Describe the three steps (in detail) and the regions where these steps occur required for a skeletal muscle contraction to occur. Diagram(s) is (are) encouraged.
The nuclear-bag fibers of muscle spindles are innervated by :-a- Aγ nerve fibersb- Aβ nerve fibersc- Aδ nerve fibersd- Ia nerve fibers
Thick and thin myofilaments have different properties. For each phrase below, indicate whether the filament described is thick or thin (write thick or thin in the blanks).__(1) contains myosin heads__(2) contains actin__(3) does not lie in the H zone__(4) contains myosin__(5) attaches to a Z disc__(6) does not lie in the I band
Label the molecular components of the myofilaments from a close up view of a model of a relaxed sarcomere
Describe an aspect of skeletal muscle metabolism that is of interest to you, explain how it applies cell function. Add the references in APA style.
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.
In the process of muscle contraction, which of the following steps immediately comes after the propagation of an action potential down the t-tubules of a myofiber? sliding of tropomyosin causing exposure of actin binding of myosin head to actin's active site release of calcium from the terminal cisternae binding of acetylcholine to its receptor influx of sodium at the sarcolemma

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