0
When muscles contract and relax rapidly it is usually called twitching, or fasciculation. It is usually harmless and sometimes caused by a reflex action through the spinal cord, or from an imbalance in electrolytes in the blood, or even excess calcium inside the muscle cells. Rarely it is caused by a neurological problem. So unless it is constant and severe, it is more likely nothing to worry about.
Wiki User
∙ 16y ago
Add your answer:
Earn +20 pts
What muscle relaxes and what muscle works?
I think what your after is called an antagonistic pair of muscles, for example the bicep and the tricep. When the bicep is contracting the tricep relaxes and when the tricep is contracting the bicep relaxes.
Skeletal muscles always work in antagonistic pairs.?
false....
What will happen when striated muscles contract rapidly for a long time?
They will tire.
Why do muscles ocontract and relax?
Yes, all muscles will contract and relax, Except the cardiac muscle and involuntary muscles which will be constantly working. er. Heart, intestines. But Voluntary muscles will only work together antagonistically.
How your arm uses muscles to move?
Your arm uses its bicep and tricep muscle to move. Muscles can only contract so they have to work in pairs. Ex. Bicep and tricep One muscle contract, the other relaxes
What happens to muscles when you straighten your arm?
There are many arm muscles. The triceps (on the back of your upper-arm) contract when you straighten your arm, and the biceps (the front of the upper-arm) relaxes.
Is this statement true or false Skeletal muscles always work in antagonistic pairs?
True, muscles always work where one contract another relaxes.
What muscel contract when you forcefully exhale?
The internal and external oblique abdominis, transverse abdominis, and the rectus abdominis on the anterior (front) part of the body. The posterior (or back) ones include the quadratus lumborum iliacus and psoas major and minor. Forced expiration muscles are used in coughing but also are important in singing.
Which specialized tissue contracts and relaxes?
Muscles are tissues that are specialized for contractions.
What are all of the skeletal muscles in the body?
Muscles are set kind off like sets. Muscles can only contract and relax. It takes at least two muscles to move a part of the body fully. For example, when your arm is straight, your triceps (back of your arm) contract and the bicep relaxes. When your move your arm to a l shape, the bicep contacts and the tri relaxes. This happens through out the whole body.
What muscles relax when the agonist muscles contract?
in the arm: bicep contracts (agonist) triceps relax (antagonist) in the leg: hamstrings contract (agonist) quadriceps relaxes (antagonist) remember the agonist is the muscle "agonising" to do the work - like pulling the joint.
What exhalation occurs when the relaxes causing the lungs to contract?
The lungs do not contract. When you breathe out, or exhale, your diaphragm relaxes and moves upward into the chest cavity. The intercostal muscles between the ribs also relax to reduce the spacein the chest cavity.As the space in the chest cavity gets smaller, air rich in carbon dioxide is forced out of your lungs and windpipe, and then out of your nose or mouth.Breathing out requires no effort from your body unless you have a lung disease or are doing physical activity. When you're physically active, your abdominal muscles contract and push your diaphragm against your lungs even more than usual. This rapidly pushes air out of your lungs.
