Which component of blood works to stop bleeding?

• white blood cells

• platelets

• hemoglobin

• plasma

What filters air entering the body?

• cilia and mucous

• platelets and cilia

• lungs and alveoli

• alveoli and tiny hairs

What is another name for the voice box?

• larynx

• trachea

• pharynx

• epiglottis

What surround each alveolus?

• cilia

• capillaries

• arteries

• veins

Which is not a function of the skeletal system?

• provide support

• digestion of food

• produce blood cells

• protection of organs

A runner experiences calf pain after running without a warm up. What cold be the problem?

• osteoporosis

• tendonitis

• sprain

• arthritis

Annette cut her foot on a nail. The cut became infected. Which part of the blood will help fight the infection?

• red blood cells

• white blood cells

• platelets

• plasma

What controls the action of smooth muscles?

• voluntary action

• the skeletal system

• conscious effort

• involuntary action

Which of these is not something that is unhealthy for your breathing?

• asthma

• tobacco smoke

• exercise

• for pollution

Which two minerals are important for strong bones?

• zinc and silver

• sulfur and iron

• potassium and sodium

• calcium and phosphorus