The Human Body

Muscles

100

d. cardiac muscles and skeletal muscles

Which can muscle cells form? a. blood cells and bone cells b. bone cells and cardiac muscles c. bone tissue and involuntary muscles d. cardiac muscles and skeletal muscles

200

b. helps you move, protects your organs

Which are jobs of the skeletal system? a. makes calcium, fights disease b. helps you move, protects your organs c. helps you breathe, makes your heart beat d. protects you from disease, makes muscles

300

b. skeletal

Which of these kinds of muscle is voluntary? a. heart b. skeletal c. breathing d. digestion

400

c. when one muscle contracts, the other relaxes

How does a pair of skeletal muscles work together? a. both muscles contract at the same time b. both muscles relax and then work together c. when one muscle contracts, the other relaxes d. when one muscle is voluntary, the other is involuntary

500

Skeletal muscles are voluntary and help you move. Smooth muscles are involuntary and work automatically. Cardiac muscles are involuntary and found only in the heart.

How do skeletal, smooth and cardiac muscles differ?

respiratory

100

b. from pharynx, to trachea, to bronchial tubes

Which describes the path of air through the body after it enters the nose or mouth? a. from bronchial tubes, to trachea, to lungs b. from pharynx, to trachea, to bronchial tubes c. from trachea, to bronchial tubes, to pharynx d. from windpipe, to bronchial tubes, to trachea

200

Air is breathed in, blood takes the oxygen from the air in the lungs and carries it to the cells. Then carbon dioxide is breathed out.

How do respiratory and circulatory systems provide oxygen to the body and rid it of carbon dioxide?

Nerves, Viruses, and Bacteria

100

d. they are in the nervous system

Which is true of nerve cells, or neurons? a. they are involuntary muscle cells b. they are only found in the spinal cord c. they are also called connective tissue d. they are in the nervous system

300

a. viruses are much smaller than bacteria

How are viruses and bacteria different? a. viruses are much smaller than bacteria b. viruses cure illness, and bacteria spread illness c. bacteria is an antibody, and a virus is a pathogen d. bacteria enter through the nose, and viruses enter through the skin

400

c. the first antibiotic

What important discovery did Alexander Fleming make? a. the first vaccine b. the first pathogen c. the first antibiotic d. the first microorganism

Digestive System

100

d. the process of breaking food into a form cells can use

What is digestion? a. what happens in the heart and lungs b. the process of making blood in bones c. making sure the body has enough oxygen d. the process of breaking food into a form cells can use

200

a. esophagus, small intestine

Which are the organs of the digestive system? a. esophagus, small intestine b. connective tissue, tongue c. spinal cord, large intestine d. voluntary muscles, stomach

300

Devons muscles and teeth chew the food and send it down the esophagus to the stomach and upper and lower intestine. There it is broken down into a very small form that the cells can use as nourishment. Muscles in his jaw help break down the food, and involuntary muscles in the digestive system help digest the food. The defense system keeps E. Coli from making Devon sick by attacking the E. Coli with antibodies to keep the pathogen from infecting him.

Devon eats an undercooked hamburger that contains pathogen E. Coli. Explain how the digestive, muscular, and defense systems work on the hamburger to nourish Devon and defend him against illness.

Etc.

100

c. sends messages to body systems

Which tells what the brain does? a. brings oxygen to the blood b. helps support the body c. sends messages to body systems d. breaks down nutrients so the cells can use them

200

a. she has built up antibodies to measles

Maria was ill with measles when she was younger. Why will she not get the disease again? a. she has built up antibodies to measles b. she has developed pathogens that protect her c. she will no longer let measles enter the body d. she has bacteria that will keep her from getting sick

300

Blood collects on the right side of the heart, which sends it to the lungs where it gets oxygen. Then the left side of the heart collects the oxygen-rich blood and sends it to the body, which needs oxygen. The path starts again when the blood that needs oxygen returns to the heart.

Describe the path of blood through the body.