Muscles exert force by _____________.
converting ADP and organic phosphate into ATP
interfering with the forces of gravity and friction
pulling on surrounding tissues
rapidly relaxing the muscle fibers
A?
Since this not my area of expertise, I got this from Wikipedia:
ADP cycling supplies the energy needed to do work in a biological system, the thermodynamic process of transferring energy from one source to another. There are two types of energy: potential energy and kinetic energy. Potential energy can be thought of as stored energy, or usable energy that is available to do work. Kinetic energy is the energy of an object as a result of its motion. The significance of ATP is in its ability to store potential energy within the phosphate bonds. The energy stored between these bonds can then be transferred to do work. For example, the transfer of energy from ATP to the protein myosin causes a conformational change when connecting to actin during muscle contraction.
The cycle of synthesis and degradation of ATP; 1 and 2 represent output and input of energy, respectively.
It takes multiple reactions between myosin and actin to effectively produce one muscle contraction, and, therefore, the availability of large amounts of ATP is required to produce each muscle contraction. For this reason, biological processes have evolved to produce efficient ways to replenishment the potential energy of ATP from ADP.
I hope this helps.
The correct answer is: pulling on surrounding tissues.
The correct answer is: pulling on surrounding tissues.
Muscles exert force by pulling on the surrounding tissues in our body. When a muscle contracts, it generates tension that allows it to pull on structures such as bones and tendons, resulting in movement. This pulling action is what enables us to perform various physical activities such as walking, lifting objects, and even smiling.
To get the answer to this question, you can start by understanding the basic function of muscles and how they generate force. Muscles contain muscle fibers that contract and relax to generate movement. By knowing that muscles are responsible for applying force, you can eliminate options like converting ADP and organic phosphate into ATP or rapidly relaxing the muscle fibers, as these options do not relate directly to how muscles exert force.
Once you have narrowed it down to the remaining options, you can reason that while muscles do help us counteract the forces of gravity and friction when we are moving, the primary way they exert force is by pulling on surrounding tissues.