EXAM ONE (MCQ1)
1.What is the main function of the respiratory system?
A. To break food down.
B. Supply the blood with oxygen.
C. Circulate the blood.
D. B and C.
E. All of above.
2. The exchange of gases between blood and cells is called
A. Pulmonary ventilation.
B. Internal respiration.
C. External respiration.
D. Cellular respiration.
3. How does the respiratory system deliver oxygen to different parts of the body?
A. Breathing.
B. Circulation.
C. Inhale carbon dioxide.
D. None of above.
E. All of Above.
4. Which part of the body is not used for the respiratory system to work?
A. Mouth
B. Nose
C. Small intestine
D. Diaphragm
E. A and D.
5. Which of the following does NOT belong to the conducting portion of the respiratory system?
A. Alveoli
B. Bronchioles
C. Nose
D. Pharynx
6. The structure which closes off the larynx is the:
A. Glottis.
B. Adam's apple.
C. Epiglottis.
D. Vocal cords.
7. What is the trachea?
A. The tube connecting the lungs to the outside of the body.
B. The network of second-largest air sacs within each lung.
C. The outermost lining of the lungs.
D. None of the above.
8. The trachea is a part of the respiratory system. What can the trachea also be called and what is its function?
A. Windpipe, filters the air we breathe.
B. Windpipe, releases air out of the body.
C. Tubes; carries air to the lungs.
D. All of above.
E. None of above.
9. Which of the following describes a correct order of structures in the respiratory passeways?
A. Pharynx, trachea, larynx, bronchi, bronchioles
B. Larynx, pharynx, trachea, bronchiles, bronchi
C. Trachea, pharynx, larynx, bronchi, bronchioles
D. Pharynx, larynx, trachea, bronchi, bronchioles
10.The exchange of gases occurs in the:
A. Trachea.
B. Bronchioles.
C. Alveoli.
D. Bronchus.
11.About how many miles of airways do your lungs contain?
A. 150 miles.
B. 1500 miles.
C. 100 miles.
D. 500 miles.
12.What is the diaphragm?
A. The seal of tissue at the top of the trachea that stops food or drink from being inhaled.
B. A sheet of muscle beneath the lungs that is essential for breathing.
C. The cup-like structure found at the base of each lung that aids the gas exchange.
D. B and C.
13.What is the diaphragm's main function?
A. Pump blood into the lungs
B. Pump carbon dioxide out of the lungs and pull oxygen into the lungs
C. Pump oxygen out of the lungs and pull carbon dioxide into the lungs
D. All of above.
14.Inside each of the lungs there are tubes called bronchi. These branch into even smaller tubes much like the branches of a tree. What are at the ends of these tubes?
A. Aleoli.
B. Diaphragms.
C. Cells.
D. A and C.
15.The volume of air that can be exhaled after normal exhalation is the
A. Tidal volume.
B. Residual volume.
C. Inspiratory reserve volume.
D. Expiratory reserve volume.
16.The volume of air in a normal breath is called
A. Total lung capacity.
B. Vital capacity.
C. Tidal volume.
D. Residual volume.
17.Gas exchange in the lungs happens by the process of
A. Osmosis.
B. Diffusion.
C. Exocytosis.
D. Active transport.
18.Most oxygen in the blood is transported
A. As gas dissolved in plasma.
B. As oxyhemoglobin.
C. As carboxyhemoglobin.
D. As bicarbonate.
19.The primary chemical stimulus for breathing is the concentration of
A. Carbon monoxide in the blood.
B. Carbon dioxide in the blood.
C. Oxygen in the blood.
D. Carbonic acid in the blood.
20.How do the lungs stay inflated?
A. Each lung is ribbed with cartilage to prevent collapse on exhalation.
B. The lungs are tethered to the ribcage with a network of connective tissue.
C. The lungs rely on a vacuum within the chest, maintained by the diaphragm.
D. By intercostal muscles.
