Which of the following best describes the phenomenon of actin filament treadmilling? O Treadmilling refers to the transportation of actin filaments by motor proteins from one location to another. Actin filament treadmilling does not require ATP hydrolysis. Treadmilling occurs when actin subunits are removed from the minus end (also called pointed end) and at the same time more actin subuntis are added at the plus end (also called barbed end). Actin filament treadmilling only occurs at very high concentration of free actin monomer.

Q: requires

A: Answer:- Striated and smooth muscle activation differ because: Let's , elaborate on all the options…

Q: List the three important properties of a myosin head. Whatis a cross-bridge?

A: Muscle Contraction Is Triggered When an Action Potential runs along the Nerves to the Muscles.…

Q: The Sarcomere 2 Thin filaments are often named for which protein? a. actin b. myosin c. troponin d.…

A: The sarcomere is the smallest functional unit of a skeletal muscle fiber. It is a highly organized…

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A: Skeletal muscles are muscles which are under voluntary control. They are also known as striated…

Q: The organization of myosin in smooth and striated muscle:

A: Smooth muscle consists of thick and thin filaments that are not arranged into sarcomere.In skeletal,…

Q: Select the best answer or answers from the choices given: Thick and thin myofilaments have different…

A: The term myofilaments refer to the myofibril filaments composed of proteins. The thick myofilaments…

Q: Striated muscle twitch force reaches a maximum after nearly all of the calcium is pumped out of the…

A: The correct answer is:D.) Calcium is the initial switch to turn the actin thin filament on and then…

Q: What are the mechanisms for muscle contraction vs. relaxation in regards to myosin/thick…

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Q: What happens when troponin and tropomyosin block the active sites of actin? O The muscle contraction…

A: Troponin is basically a complex of three regulatory proteins which are troponin I, troponin C, and…

Q: As mentioned in class, one additional major use of ATP in skeletal muscle (besides powering the…

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Q: Question 18 Analyze the image below. Explain what happens during muscle con- traction according to…

A: Introduction: Myofibrils consist of parallel bundles of protein microfilaments, known as…

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Q: 28) the large protein that attaches to myosin and stabilizes it when the sarcomere shortens is: a)…

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Q: A researcher wanted to investigate the relationship between Ca²+ binding proteins and the speed of…

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Q: According to the when its______ Group of answer choices sliding-filament model of muscle…

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Q: True or False

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Q: a) Why are muscles not in a contracted state all the time? b) Several hours after the death of an…

A: Muscles These are defined as the soft tissues that are involved in the movement of the body and in…

Q: 7. Identify each of the following when given images of skeletal muscle fibers such as the ones…

A: The nerve impulses from the axon terminal of motor neuron goes to the skeleton muscles. The junction…

Q: Name and describe the function of the two regulatory proteins on the actin thin filament muscle.

A: Introduction There are various types of muscles are present in our body which perform various…

Q: 4. A transverse section across theT + a) I-band to one side of the Z-line would bisect only actin…

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Q: The ability of myosin to walk along an actin filament may be observed with the aid of an…

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Q: atent phase V [ Choose ] Active return of Ca2+ into SR Ca2+ released from SR Power stroke of…

A: Alpha motor neurons are the neurons which  innervate the skeletal muscle fibers. On entering a…

Q: QUESTION 2 Select the correct statement regarding the actin cytoskeleton. O They are involved in the…

A: 2) when actin is first produced in the cell, it occurs in the globular form . But in the…

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: Your answer MUST answer all the aspects of the question - write your answer clearly & use…

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Q: • Myosin pulls the actin strands • An action potential arrives at the neuromuscular junction •…

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Q: A motor unit associated with the stimulation of skeletal muscle is designated as a 1:8 motor unit.…

A: A motor unit is made up of a motor neuron and the skeletal muscle fibres innervated by that motor…

Q: 13 QUESTION 13 Which of the following is a characteristic of Slow-twitch (Oxidative) muscles? O A.…

A: The question is asking to identify the characteristic that is associated with slow-twitch…

Q: During an experiment, the protein troponin from a skeletal muscle fiber was removed. This resulted…

A: The muscle contraction involves interaction between actin (thin filament) and myosin (thick…

Q: Please fill in the blanks: 21) the binding of ______________ to troponin removes troponin from…

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Q: Choose the best description of how myosin and actin are arranged within the two types of protein…

A: In order to facilitate movement, muscles are attached to bones. They function by shortening…

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.