The muscular system helps the body move and gives it shape. Muscles can be voluntary, such as your skeletal muscle, (you consciously control their movement) or involuntary, such as your heart, stomach, and bladder (which you don’t consciously control). Skeletal muscle is the muscle attached to your skeletal system that allows your bones to move up and down.

Question

The skeletal system works with the muscular system to help you move and protect your internal organs. For example, the cranium, or skull, protects the brain, and the ribcage protects the heart and lungs. Joints are the places where two bones meet. Without joints, we wouldn’t be able to move. Different kinds of joints allow bones to move in different ways. For example, hinge joints, like those in your elbows and knees, allow back and forth movement.

Which of the following is an example of an involuntary movement?

A
your stomach rumbling

B
snapping your fingers

C
shaking your leg

D
waving your arm

Answer 1

The correct answer is:

A your stomach rumbling

This is an example of an involuntary movement, as it is controlled by the autonomic nervous system and happens without conscious effort. The other options (B, C, and D) involve voluntary movements that you consciously control.