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Muscles can only pull, so for joints that need to go both ways (like your elbow, up and down) you need one muscle to flex, one to extend. These are Flexors and Extensors, or can be called the Prime Mover and Antagonist.
There's a third muscle which are grouped up as the synergists, which simply helps the Prime Mover do its job. For example, Lifting your leg up would be using the following: Quadriceps as the Prime Mover, Hamstring as the Antagonist, and your glutes as the synergist.
Hope that helped! ^^
What else can I help you with?
What do the muscles in the body attach to?
bones
Which of these are muscles that are attached to bones and function when we move them?
Muscles that are attached to the bone and allow body movements are Skeletal Muscles.
What is a description of the function of muscles?
the muscles make each movable bone move in you body
What quadriceps muscles are attached to?
Quadriceps muscles are attached to the tibia via patella. Patella is a sesamoid bone. On the other the three of the four muscles are attached to the femur bone. Rectus femoris is attached to the hip bone as well. So it can act on hip bone also. Other way round it can take support of hip bone to act on tibia. Other three muscles are specially designed to act on tibia bone only. They are originated from femur bone.
Which bones help the body move for lifting objects?
Just about every bone in teh body helps move or lift objects. bones act as levers for the muscles to contract against. wiki on!
Why are bones and muscles important?
To move a body part, you need two muscles- a flexor, which bends a part of your body, and an extensor, which extends a part of your body. If you need two muscles for every bone, you end up witha lot more muscles.
Lightest bone in the human body?
The lightest bone in your body is the three Ossicles in your ear.
What is the Only floating bone in the body?
The only floating bone in the human body is the hyoid. It is a U-shaped bone about 2 inches long, running parallel to the ground, and covers the voicebox, being held in place by three sets of muscles, the tongue muscles.
What muscles depresses the hyroid bone and larynx?
The sternohyoid muscle, Omohyoid muscle, and Thyroid muscle are three muscles that are responsible for the depression of the hyoid bone.
Why are tendons important to a muscles ability to make the body move in a chicken wing?
Tendons connect muscles to bone.
Where is a bone cell found in body?
Mature bone cells, called osteocytes, are found in the hard portions of every bone in the body.
What body weight includes muscles vital tissues organs and bone?
lean
