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Oxytocin.
When a joint is bent, the muscles around that joint contract and shorten. This causes the joint to move, resulting in the bending or flexing of the joint. The specific muscles involved and the degree of contraction depend on the joint and the movement being performed.
This process is called contraction. Muscles shorten or contract to produce movement.
Skeletal muscles
Under normal inspiration the chest wall stays relatively still, only the abdomen moves because of diaphragmatic motion. However, when you take a deep breath the intercostal muscles and the scalene muscles contract. This causes the chest wall to expand outward(due to the intercostals) and move upwards(due to the scalenes).
Meat
Oxytocin.
When a joint is bent, the muscles around that joint contract and shorten. This causes the joint to move, resulting in the bending or flexing of the joint. The specific muscles involved and the degree of contraction depend on the joint and the movement being performed.
Medicinal cannabis causes the muscular system in the human body to contract or relax. Try it :)
it is a problem in the nervous system
beta blockers
The intercostal muscles, (muscles between the ribs), contract.
Rigor mortis occurs because the muscles in the corpse contract. This contraction occurs because the calcium ions that are stored in the muscles diffuses and causes the myosin and actin proteins to activate, but not release.
auto-rhythmic cardiac muscle
This process is called contraction. Muscles shorten or contract to produce movement.
Oxitosin is the hormone. It is secreted by pituitary.
Current causes muscles to contract and that is dangerous especially if the heart muscle is affected.