The function of ATP during muscle contraction is to a. cause...

Name: Problem 5, Chapter 45: Biology
Uploaded: 2021-07-12T21:10:19-08:00
Duration: 5 min 8 s
Channel: Norma Kimmel
Description: The function of ATP during muscle contraction is to a. cause an allosteric change in myosin so it detaches from actin. b. provide the energy necessary for the movement of the crossbridge. c. expose the myosin-binding sites on the thin filaments. d. do all of the above. e. do a and b only

The function of ATP during muscle contraction is to a. cause an allosteric change in myosin so it detaches from actin. b. provide the energy necessary for the movement of the crossbridge. c. expose the myosin-binding sites on the thin filaments. d. do all of the above. e. do a and b only

The function of ATP during muscle contraction is to
a. cause an allosteric change in myosin so it detaches from actin.
b. provide the energy necessary for the movement of the crossbridge.
c. expose the myosin-binding sites on the thin filaments.
d. do all of the above.
e. do a and b only

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Key Concepts

ATP Hydrolysis

ATP hydrolysis is the chemical reaction in which ATP is broken down into ADP and inorganic phosphate, releasing energy. In muscle contraction, this energy is used to drive conformational changes in the myosin molecule, particularly in the myosin head, which is essential for initiating the contraction cycle.

Myosin-Actin Interaction

The interaction between myosin and actin is central to the contraction process in muscle fibers. ATP binds to the myosin head, causing it to detach from actin, and its subsequent hydrolysis provides the energy needed for the myosin head to reattach and perform a power stroke, resulting in muscle contraction.

Crossbridge Cycle

The crossbridge cycle describes the series of mechanical and biochemical events during muscle contraction. It includes the binding of myosin to actin, the power stroke that pulls the actin filament, the detachment of the myosin head induced by ATP binding, and the reactivation of the myosin head with ATP hydrolysis, preparing it for another cycle.

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