Place the number of the correct answer to each of the following multiple choice questions in the appropriate space on the answer sheet provided.
1. In humans, the small chambers of the lungs involved in the exchange of gases are the (1.) atria (2.) alveoli (3.) tracheal tubes (4.) pulmonary bronchi
2. Among humans, an increase in the rate of respiration and heartbeat results when the blood contains (1.) too little glucose (2.) too little oxygen (3.) too much carbon dioxide (4.) too much nitrogenous waste
3. The rate of breathing in humans is controlled mainly by the (1.) medulla (2.) cerebellum (3.) cerebrum (4.) spinal cord
4. A disease involving the breakdown of the air sacs in the lungs is (1.) arteriosclerosis (2.) coronary thrombosis (3.) asthma (4.) emphysema
5. When you hold your breath for half a minute, the carbon dioxide concentration in the blood (1.) increases (2.) decreases (3.) remains the same
6. Which process occurs during the exchange of gases at the air sacs? (1.) diffusion (2.) osmosis (3.) phagocytosis (4.) breathing
7. Which blood vessels surround all of the air sacs? (1.) arteries (2.) veins (3.) capillaries (4.) lymphatics
8. Which structures contains the vocal cords, whose vibration makes speech possible? (1.) larynx (2.) epiglottis (3.) trachea (4.) pharynx
9. Which structures connect the bronchi with the alveoli? (1.) air sacs (2.) tracheas (3.) bronchioles (4.) capillaries
10. Which (are) part of the nasal cavity's function(s)? (1.) filter incoming air (2.) warm incoming air (3.) moisten incoming air (4.) all of the above are functions of the nasal cavity
11. Which is a correct listing in order of the structures air must pass through on the way to the lungs? (1.) larynx, pharynx, trachea, bronchi (2.) pharynx. larynx, bronchi, trachea (3.) pharynx, epiglottis, larynx, trachea (4.) pharynx, glottis, larynx, trachea
12. Which disorder results in a decrease in usable alveoli as they become rigid and break? (1.) asthma (2.) emphysema (3.) pneumonia (4.) bronchitis
13. The breathing rate of humans is principally regulated by the concentration of (1.) carbon dioxide in the blood (2.) oxygen in the blood (3.) platelets in the blood (4.) white blood cells in the blood
14. Respiratory wastes in the blood of man are carried chiefly in the form of the (1.) ammonia molecule (2.) hydrochloric acid (3.) bicarbonate ion (4.) hemoglobin molecule
15. Oxygen is carried in man chiefly by the (1) ammonia molecule (2.) hydrochloric acid molecule (3.) carbonate ion (4.) hemoglobin molecule
16. A common respiratory adaptation of animals and protozoa is the presence of (1.) moist membranes across which gas exchange occurs (2.) a system of tubular vessels which carry gases (3.) lungs where respiratory gases are exchanged (4.) organs of respiration composed of specialized cells
[Completion Section]
1. The taking in of air is called _______________.
2. The muscle which separates the mammalian thoracic cavity from its abdominal cavity is called the _______________.
3. The trachea is supported by rings of _______________.
4. The part of the brain controlling the respiration rate is the _______________.
1. 2
2. 3
3. 1
4. 4
5. 1
6. 1
7. 3
8. 1
9. 3
10. 4
11. 4
12. 2
13. 1
14. 3
15. 4
16. 1
Completion section answers
1. inhalation
2. diaphragm
3. cartilage
4. medulla