Choose the letter of the correct answer. 1. Tiny hairs inside the nose prepare air for the lungs by a. cleaning it b. drying it c. moistening it d. warming it 2. Why are lungs important? The lungs A. get rid of waste products to the cell in the body. B. remove bacteria and other particles in the air. C. Transport nutrients to the different parts of the body D. Supply the body with oxygen and remove carbon dioxide as waste of the body. 3.Whart are the functions of the respiratory system? a. helps remove carbon dioxide from the body b. transports air into the lungs c. facilitates the diffusion of oxygen into the bloodstream d. all of the above 4. Which pattern shows the correct order of the components of the respiratory system? a. nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, alveoli, diaphragm b. pharynx, nose, larynx, trachea, bronchi, bronchioles, alveoli, diaphragm c. mouth, larynx, pharynx, bronchi, trachea, bronchioles, alveoli, diaphragm d. larynx, pharynx, trachea, bronchi, bronchioles, alveoli, diaphragm, mouth 5. When you exhale, the diaphragm helps air leave the body by a. expanding the lungs c. pushing air into the lungs b. making the chest larger d. making the chest smaller 6. What happens when you breathe in air ? a. The diaphragm expands and the rib cage contracts b. The diaphragm contracts and the rib cage expands c. The diaphragm expands and the rib cage collapses d. The diaphragm contracts and the rib cage remain the same 7. How does the diaphragm move when you exhale? It a. contracts b. expands c. relaxes d. sinks 8.What is the function of the cilia in the trachea? a. To trap particles of dust and dirt c. To direct the flow of air b. To moisten and warm the dust d. To add moisture to the air 9.What surrounds the trachea and helps it open as air passes through it? a. rings of muscles b. rings of cartilage c. series of bones tissues d. soft 10.What surrounds the alveoli and what passes between them? a. capillaries, oxygen and carbon dioxide b. cilia, oxygen and carbon dioxide c capillaries, oxygen and water d. bronchioles, oxygen and carbon dioxide
