When one muscle contracts, the other one expands.
Compression
A pulled muscle occurs when muscle fibers are stretched beyond their limit, leading to pain and limited range of motion. A strained muscle, on the other hand, involves the overextension or tearing of muscle fibers or tendons, causing pain, swelling, and loss of function. Both injuries are common during physical activity and require rest, ice, compression, and elevation for treatment.
when a muscle contracts or shortens the attached bones are pulled closer to each other
it's called a pain in the butt....you should then turn the other cheek...
During muscle contraction, the Z-lines move closer together as the sarcomeres shorten. This is due to the sliding of actin and myosin filaments past each other, resulting in the contraction of the muscle.
all parts of the planet pulled each other toward the center of the mass by gravity
The ring finger is weaker compared to other fingers in the hand because it has a smaller muscle size and less independent movement capability. Additionally, it is connected to the middle finger through a shared tendon, which limits its strength and dexterity.
Gravitational forces within the Earth pull objects toward its center. This force causes objects to have weight and creates a downward acceleration due to gravity.
to do this trick you put your hand flat on a table then lift up your middle finger and put it underneath your hand as much as possible then try to lift your fourth finger up the one next to your pinky) it is impossible... hope this helped...
They act mean toward other frogs. I once had a green tree frog and it bit my finger off when I tried to hold it.
For immigrants some factors pushed them from their country while other factors pulled them toward America.
The sharp pain in the lower right back that feels like a pulled muscle could be due to various reasons such as a muscle strain, kidney stones, or a herniated disc. It is important to consult a healthcare professional for a proper diagnosis and treatment.