SUMMATIVE TEST 2 PE

Main function of what system? Which is to cause movement by contraction. The musculature of the human body is essential to movement.

The muscular system consists of

It gives shape to the body and are essential in performing physical movements. They account for about 40 percent of body weight. They work in pairs, while one contracts, its counterpart extends. When it contracts, bones are pulled by tendons, which attach muscles to bones.

Muscles that bend a limb at the joint are called?

Muscles that straighten a limb are called?

are special type of striated tissue that forms the walls of the heart.

Is in such places as the intestines and blood vessels. Are controlled directly by the autonomic nervous system and are involuntary, meaning that they are incapable of being moved by conscious thought. Functions such as heartbeat and lungs (which are capable of being willingly controlled, be it to a limited extent) are involuntary muscles but are not smooth muscles

A muscle fiber is made up of

smaller fiber called.

Thick and thin filaments make up each?

The thick filaments are made up of the protein.