Ch.17A

Question 1

1) What two gases are exchanged in the lungs?

Answer 1

1) O2, CO2

Question 2

2) The area across which all gas exchange occurs is about as large as;

Answer 2

2) 75m

Question 3

3) What two features of the lung surface allows gases to be exchanged (diffuse) more rapidly?

Answer 3

3) thin wall / moist surface

Question 4

4) All diffusion in the body occurs across a moist epithelial surface T/F

Answer 4

4)T

Question 5

5) Which of the following is not true for breathing in (inhalation);

Answer 5

5)ribs upward and diaphragm contracts

Question 6

6) The process for exhaling is almost the exact opposite of that for inhalation T/F

Answer 6

6)T

Question 7

7) In the exchange of oxygen and carbon dioxide, the job of the lung surface is the opposite of that of the body tissues T/F

Answer 7

7)T

Question 8

8) Extension Question (possibly E.C.); If oxygen is absorbed by the blood in the lungs, how is mouth-to-mouth resuscitation an effective way to oxygenate a person with respiratory failure?

Answer 8

8)the first amount of air that you exhale is not stale air it fresh air

Question 9

9) How does the respiratory system regulate blood pH?

Answer 9

9)by exchange in CO2 causes PH to rise

Question 10

10) One of the main jobs of the respiratory system is to produce speech T/F

Answer 10

10)T

Question 11

11) One major job of the respiratory system is to protect the body from inhaled;

Answer 11

11)Pathogens

Question 12

12) Which of the following is not one of the ways that inhaled air is modified (changed) as it enters the respiratory system;

Answer 12

12)moisten ,warm , filter

Question 13

13) Where is the prime site for the filtration, warming, and moistening of air?

Answer 13

13)Alveoli/ nasal cavity

Question 14

14) Which of the following is the correct sequence of structures that are involved as air moves OUT of the lungs;

Answer 14

14)alveoli , bronchilas,secondary bronchioles,secondary bronchii,primary bronchii, trachea,nose , mouth

Question 15

15) The alveoli have a significantly larger surface area than that of the rest of the respiratory system T/F

Answer 15

15)T

Question 16

16) The main way that gases are different than liquids is that gases can be _____ while liquids cannot

Answer 16

16)compressed

Question 17

17) The main way that gases and liquids are similar is that their flow is most easily restricted by;

Answer 17

17)changing the diameter to change the resistance

Question 18

18) The diffusion rate of oxygen is dependant on the concentration of carbon dioxide in the blood T/F

Answer 18

18)F

Question 19

19) The scientific term for breathing in is;

Answer 19

19)Inspiration

Question 20

20) The scientific term for breathing out is;

Answer 20

20)Expiration

Question 21

21) When pressure is higher inside the lungs than outside, then ____ usually occurs

Answer 21

21)expiration (exhalation)

Question 22

22) When pressure is lower inside the lungs than outside then _____ usually occurs

Answer 22

22)inspiration (inhalation)

Question 23

23) Since breathing is not usually a conscious activity, the diaphragm is composed of smooth muscle tissue T/F

Answer 23

23)F

Question 24

24) What shape describes the diaphragm when it is (relaxed/contracted)?

Answer 24

24)Shaped like an inverted U

Question 25

25) How does the contraction of the diaphragm cause air to rush into the lungs?

Answer 25

25)concavity

Question 26

26) What structures other than the diaphragm work together to accomplish respiration?

Answer 26

26)intercostal muscle pleural

Question 27

27) What is the scientific term for a collapsed lung (or air between the lung and chest wall)?

Answer 27

27)pneumothorax

Question 28

28) The way that the lungs stick to the inside of our ribs is similar to how a suction cup sticks to glass T/F

Answer 28

28)T

Question 29

29) What factor most affects air flow into and out of the lungs?

Answer 29

29)airway resistance

Question 30

30) Airway resistance is primarily dependent on;

Answer 30

30)diameter of tubes

Question 31

31) How does mucous accumulation in the respiratory system reduce air flow?

Answer 31

31)reduce/ decreases diameter

Question 32

32) What term means the contraction of smooth muscle in the bronchioles?

Answer 32

32)bronchoconstriction

Question 33

33) What effect does bronchoconstriction have on air flow?

Answer 33

33) Decrease diameter

Question 34

34) What molecules are released by mast cells during an allergic reaction

Answer 34

34)histamine

Question 35

35) What term means a generalized severe allergic reaction that can lead to death if untreated?

Answer 35

35) Anaphylaxis

Question 36

36) What normally causes bronchodilation?

Answer 36

36)increase diameter