Order the events leading to muscle contraction. Ca ions bind to troponin myosin binds to actin Nerve cell releases acetylcholine at the neuromuscular junction troponin pulls tropomyosin, exposing the mysoin binding site ATP causing myosin to move (pull) actin toward the center of the cell the sarcolemma membrane depolarizes and triggers the sarcoplamic reticulum to release Ca ions

Q: Match each protein with the appropraite myofilament

A: The sliding filament model, developed by Hugh Huxley and Jean Hanson and Andrew Huxley and Ralph…

Q: In the sliding filament model of muscle contraction, I bands contain     sacrcomeres.     thin…

A: The cytoskeletal proteins including actin filament or microfilament, microtubules and intermediate…

Q: Explain the structure and organization of muscle fascicles and the role in generating force include…

A: Bones, ligaments, muscles, tendons, etc. constitute the musculoskeletal system. The body movement is…

Q: For the skeletal muscle, hydrolyzation of ATP: Group of answer choices At the myosin head gives rise…

A: The contractile proteins that are involved in muscle contraction are myosin and actin. The two…

Q: Looking at this diagram explain the order of size dependent recruitment of motor units during muscle…

A: Car rental refers to the performance of additional vehicles to achieve increased contraction…

Q: Which is the order of glycolytic capacity between these muscle fiber types O I> lla > Ilx O Ix > la…

A: The contraction of the muscle fibre is explained by the muscle contraction theory by the 2 muscle…

Q: Note the color of each three types of muscle fiber: slow twitch, fast twitch oxidative and fast…

A: Slow twitch muscle fibers:  Resistant to fatigue  For sustained,smaller movements and control of…

Q: What is associated with the formation of a cross-bridge in skeletal muscle? ADP release from myosin…

A: Any movement requires the contraction of skeletal muscles. Muscles contain actin and myosin…

Q: What best explains the inability to fully contract a muscle when the muscle is first shortened prior…

A: Muscle contains muscle fiber cells which are specialized for contraction. The muscle movement is a…

Q: Which of the following are correct     Dynein head elongates like a lever arm.     ATP…

A: Movement of the body part is done by contraction and relaxation of contractile proteins.…

Q: Explain the characteristics of these muscle fibers: slow twitch, fast twitch oxidative and fast…

A: Skeletal muscle fibers are striated tissues. These tissues are under the control of the somatic…

Q: The endplate potential decreases with distance because

A: The end plate potential is a potential that propagates to the neighbouring patch of muscle fibre…

Q: Select the correct statements regarding myosin-mediated contraction in the sarcomere. Ca2+ is…

A: Actin and myosin work together to produce muscle contractions and, therefore, movement.

Q: describe the events that lead to muscle contraction starting at the level of the neuromuscular…

A: Muscle contraction occurs when these are initiated by a nerve signal. This is triggered by…

Q: 7 I myosin heads firmly bound to actin 8. | threshold is reached and muscle action potential is…

A: A neuromuscular junction (NMJ) or myoneural junction is the one where a motor endplate of a motor…

Q: the process of muscle contraction, which of the following steps immediately precedes the influx of…

A: Muscle contraction:-  Is the response  a muscle has to any kind of stimuli where the result is…

Q: skeletal muscles:       0.Troponin has a strong affinity              for Ca2+ Creation of…

A: Muscles There are three type of muscles cell found in human Cardiac muscle cells  Smooth muscle…

Q: I= band at the time of relaxation H= zone at the time of relaxation Sacomere at the time of…

A: During the muscle cell contraction, the sarcomere must shorten. However, thick and thin filaments…

Q: In your own words describe how acetylcholine ,calcium,and ATP are involved in the process of muscle…

A: Muscle contraction is a process where tension-generating sites in the muscles fibers are activated…

Q: * :Muscle troponin protein provides.22 Contraction Elasticity Extensibility None of the above

A: Troponins are a group of proteins that can be found in striated muscle. Its levels are low in the…

Q: Please describe when the myosin heads grab and pull on the active sites in the actin fibers

A: Muscle cells are specific for contraction. It allows for motions and facilitates bodily processes…

Q: Match the statement on the left with the best response on the right. Breaking the high energy bond…

A: Introduction :  A synapse is a small space that represents the junction between two axon terminals…

Q: As sarcomere shortening progresses during muscle contraction, which structure gets progressively…

A: A muscle contraction:-It can be defined as an increase in the tension of the muscle.-It can also be…

Q: All the following are necessary for a skeletal muscle cell to full relax, except one. Which answer…

A: Muscle is a delicate tissue found in many creatures. Muscle cells contain protein fibers of actin…

Q: Why does a skeletal muscle cell generate the same amount of tension with each single stimulus? O…

A: Neural control initiates the formation of actin and myosin cross bridges, leading to the sarcomere…

Q: What is the best description of a contraction of the sarcomere Myosin pushes the actin fibers away…

A: Muscles are the tissue that are responsible for providing the movement to the body. It also…

Q: Muscle contraction incorrect order Calcium allows myosin to bind to the actin. A message travels…

A: Note:  the question is attempted to write the correct order of muscle contraction. Muscle is the…

Q: Each of the pairs of phrases below describe steps during skeletal muscie contraction. The 2nd phrase…

A: Muscle tissue is a type of tissue which contain actin , Troponin and myosin proteins so as to allow…

Q: Which statement or statements describe why depletion of ATP after death leads to rigor mortis?

A: Rigor mortis is the third phase of death. It is one of the unmistakable indications of death,…

Q: How does the cross-bridge result in thin filaments sliding over thick for contraction? Use key…

A: As Cross-bridge is formed myosin head is locked tightly on to an actin filament. Binding of ATP to…

Q: An INCREASE in has no direct effect on increasing tension during skeletal muscle contraction.…

A: The muscles which are attached to the bones, can contract voluntarily and are mainly involved in…

Q: Which of the following statements is true?     Fast glycolytic fibers have a small diameter.…

A: Fast glycolytic Fibers:  Fast glycolytic fibers, also known as type IIb fibers, are a type of muscle…

Q: Myosin's affinity for actin occurs Following the power stroke When myosin is energized When a new…

A: Myosin is a fibrous globulin of muscle. It split ATP and react with actin in muscle contraction.…

Q: The functions of tropomyosin in skeletal muscle include sliding on actin to produce shortening…

A: 1. acting as a relaxing protein at rest by covering up the sites where myosin binds to actin  2.…

Q: If Ca2+ pumps of the sarcoplasmic reticula fail to function, what will happen to the tension…

A: Muscle is a soft tissue like structure which is primarily responsible for the movement in the body.…

Q: Muscle spindle structures consist of:     Extrafusal muscle fibers and gamma motor neurons…

A: Proprioception is the knowledge of position and movement of self. It can also be compared to sixth…

Q: Put the steps of excitation-contraction in order: 1 Myosin "heads" pivot, cause [ Choose ] Calcium…

A: The mechanism of contraction of skeletal muscle was best explained through 'sliding filament…

Q: Why does continuouns calcium release within a muscle fiber cause greater tension? Acticates more…

A: Muscle is a soft tissue like structure which is primarily responsible for the movement in the body.…

Q: Which of the following are part of the muscle contraction process?(More than one answer may be…

A: Muscle contraction is the basis of all skeletal movements. Skeletal muscles are composed of muscle…

Q: Explain the requirements for Ca2+ and ATP in muscle contraction and relaxation.  Remember that…

A: A sarcomere is the basic contractile unit of muscle fiber. it has two protein filaments  1. actin 2.…

Q: Describe the Neural excitation of the muscle and Describe how a signal arriving at the axon terminal…

A: Neurons are the basic unit of the nervous system that carry electrical stimuli throughout the body.…

Q: What step DIRECTLY causes a sarcomere to shorten? cross- bridge formation  calcium transport into…

A: A sarcomere is the unit of muscle fiber responsible for contraction. Each sarcomere is composed of…

Q: Match the following types of contractions:

A: Skeletal muscles are one of the three major categories of muscle (the other two being the cardiac…

Q: Describe and explain the sliding filament model of contraction. Be sure to include in your response…

A: The fundamental contractile unit of muscle fiber is called a sarcomere. Actin and myosin, the two…

Q: During the cross bridge cycle, what is the first event that occurs after ATP binds myosin? the power…

A: Introduction : ATPs are high-energy molecules that store the majority of the chemical energy in the…

Q: Smooth muscle contraction is controlled by releasing neurotransmitters trom: Presynaptic cleft O…

A: Smooth muscle contraction is controlled by releasing neurotransmitters from:

Q: Which of the following regions of a sarcomere does not change length during a contraction because it…

A: Skeletal muscles are voluntary muscles. The contraction and relaxation in the skeletal muscle enable…

Q: The sliding filament model depicts how myosin motors attached to actin lead to muscle contraction.…

A: Introduction:- There are different types of muscles present in our body - skeletal muscles, smooth…

Q: Why does continuous calcium release within a muscle fiber cause greater tension? O Activates more…

A: Maximal tension in muscle happens when thick and thin fibers crossover greater extent inside a…

Muscle Action

A change in the body or a bodily organ as a result of its functioning is referred to as an action. Muscle action can be defined as the specific movement of a bodily part generated by the contraction of a muscle. The muscle proteins actin and myosin are the important contractile proteins involved in muscle action. Muscle contraction, in addition to movement, serves several other important functions in the body, including posture, heat generation, and joint stability. Muscle contraction maintains posture, which includes standing and sitting.