Interactive Life Science Chapter 9

Your brain is a structure composed of different kinds of tissue. What is this kind of structure called?

• a cell

• an organ

• a tissue

• an organ system

Muscles, bones, and nerves work together to

• make your body move.

• remove waste products.

• control body functions.

• move materials in your body.

After you breathe air into your lungs, oxygen from the air goes into your ___________________.

• bloodstream

• bones

• muscles

• heart

The endocrine system produces chemicals that

• begin to function after puberty.

• require a system of nerves to control many body activities.

• travel to selected locations through tiny tubes.

• control both daily activities and long-term changes through hormones.

An effect of long-term stress is

• general health improves.

• body functions become balanced.

• immunity is strengthened.

• homeostasis is disrupted.

One function of the skeleton is to

• help control voluntary muscles.

• move food through the digestive system.

• help the body maintain a steady body temperature.

• provide shape and support for the body.

What kind of motion is possible with a hinge joint?

• backward or forward

• rotating

• sliding

• side to side

The spaces in bones are filled with a soft connective tissue called

• cartilage.

• marrow.

• water.

• blood.

Which type of muscle is found only in the heart?

• soft muscle

• cardiac muscle

• soft muscle

• voluntary muscle

How do pairs of skeletal muscles work together?

• Both muscles contract at the same time.

• Both muscles extend at the same time.

• While one muscle in the pair contracts, the other returns to its original length.

• One muscle in the pair pulls on a bone, while the second muscle pulls on the first muscle.