Biology: Chapter 26, 27, & 28 Test

The brain is connected to the spinal cord by the

• cerebrum.

• brain stem

• sensory cortex

• vertebrae

Both the nervous and the endocrine systems allow you to

• analyze thoughts

• respond to stimuli

• control growth

• react at the same rate

Which of the following carries messages to parts of the body?

• targets

• sensors

• hormones

• organs

The body works to maintain homeostasis in response to what conditions?

• tissue and cell formation

• production of key vitamins

• cell differentiation and determination

• internal and external changes

What organ in the human body is most like the captain of the ship?

• the brain

• the heart

• the lungs

• the skin

A pulmonary artery carries blood from

• the right ventricle to the lung.

• the lung to the left atrium.

• one lung to the other.

• the pulmonary vein to the heart.

When your heart and breathing speed up or slow down, your body is trying to

• increase lung volume.

• bring in more carbon dioxide.

• increase its red blood cells.

• maintain homeostasis.

Which of the following enables the heart’s chambers to contract and relax after being stimulated?

• the mitral valve

• the septum

• the cardiac muscles

• the tricuspid valve

How do respiratory diseases like asthma, emphysema, and cystic fibrosis affect the respiratory system?

• They make gas exchange more difficult.

• They block all air from entering the lungs.

• They prevent the blood from carrying O2

• They keep white blood cells from fighting infection.

The heart’s natural pacemaker is the

• medulla and pons.

• diaphragm.

• right ventricle.

• sinoatrial node.