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For attachment of myosin heads to actin, calcium ions must bind to troponin, causing tropomyosin to move out of the way, exposing the binding site on actin. ATP then binds to the myosin head, leading to its activation and attachment to actin. For detachment, ATP is hydrolyzed, causing a conformational change in the myosin head that releases it from actin.

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1y ago

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Related Questions

What does myosin attach to?

During muscle contraction, myosin cross bridges attach to active sites of ACTIN FILAMENTS.


What makes rigormortis cease after 72 hours?

The myosin heads detach from actin, allowing the muscles to relax; prior to rigor mortis, Directly after death ATP is not produced therefore, Ca +2 is absent within the myosin binding sites on the actin, which leads to the myosin heads not being able to detach from actin, this condition doesnt allow the muscle to relax, aka rigor mortis. For the muscle to relax or for rigor mortis to cease the myosin heads detach from actin.


During muscle contraction myosin cross bridges attach to which active sites?

actin filaments


What are the proteins are involved in muscle contraction?

Actin and myosin


What happens to ATP when it binds to Myosin?

When ATP binds to myosin, it causes myosin to release actin, allowing for muscle relaxation. The energy stored in ATP is used to detach myosin from actin and prepare the cross-bridge for another contraction cycle.


When ATP attaches to a myosin head, what specific role does it play in the process of muscle contraction?

When ATP attaches to a myosin head during muscle contraction, it provides the energy needed for the myosin head to detach from actin, allowing the muscle to relax and reset for the next contraction.


Does ATP cause the detachment of myosin from actin?

No, ATP does not cause the detachment of myosin from actin. ATP is used to fuel the cross-bridge cycle in muscle contraction, providing the energy needed for myosin heads to form cross-bridges with actin. Detachment of myosin from actin is facilitated by a conformational change in the myosin head when ATP is hydrolyzed.


Myosin cross bridges attach to active sites of?

actin filaments in muscle cells during muscle contraction.


What are the names of protein filaments in a muscle fiber?

Actin Filaments


During skeletal muscle contraction myosin cross bridges attach to active sites of?

During skeletal muscle contraction myosin cross bridges attach to active sites of actin filaments. Actin filaments bind ATP. Their growth is regulated by thymosin and profilin.


What are two myofilaments that slide past one another to allow muscle cells to contract?

The two myofilaments that slide past one another to enable muscle contraction are actin and myosin. Actin makes up thin filaments while myosin forms thick filaments. During muscle contraction, myosin heads attach to actin filaments and pull them towards the center of the sarcomere, causing the muscle to shorten.


How do proteins actin and myosin interact to make a muscle contract?

Myosin and Actin