Bio 167 Chapter 39 Review UPDATED
ACTUAL Exam Questions and CORRECT
Answers
A patient has a defect in mucus production. What outcome(s) do you predict may occur as a
consequence? Select all that apply.
A) Cold, dry air damages the trachea and lungs.
B) Germs invade the respiratory tract.
C) Warm, humid air damages the trachea and lungs.
D) Dust accumulates in the respiratory tract.
E) Residual Volume will decrease.
F) Respiration improves due to less obstruction.
G) Tidal Volume will increase.
H) Vital Capacity will increase. - CORRECT ANSWER - A) Cold, dry air damages the
trachea and lungs.
B) Germs invade the respiratory tract.
D) Dust accumulates in the respiratory tract.
Why is cigarette smoking a "double whammy" for the lungs?
A) Tar and chemicals make cells vulnerable, and low mucus lets germs in.
B) Tar and chemicals paralyze cilia, but also lead to excessive mucus production.
C) Smoke and nicotine clog alveoli.
D) Tar and nicotine activate acetylcholine receptors. - CORRECT ANSWER - B) Tar and
chemicals paralyze cilia, but also lead to
Fish use gills to extract oxygen from water, where it is at concentrations less than 1%. Yet if they
are pulled out of the water, they cannot breathe air with 21% oxygen. What is the most likely
explanation?
A) The gill arches immediately dry out, preventing gas exchange
, B) The gill lamellae are killed from the toxic high levels of oxygen in the air
C) The gills do in fact function to extract oxygen from air, but they require water to exhale
carbon dioxide
D) Without water to support them, gill filaments collapse and lose surface area - CORRECT
ANSWER - D) Without water to support them, gill filaments collapse and lose surface
area
When CO2 levels increase in the blood, what happens to the blood? Select all that apply.
A) hydrogen ion concentration decreases
B) pH increases
C) blood becomes more acidic
D) pH decreases
E) blood becomes basic - CORRECT ANSWER - C) blood becomes more acidic
D) pH decreases
A(n) ____ in blood CO2 will cause a(n) ____ in blood pH. This leads to a(n) ____ in breathing
rates.
A) increase; increase; increase
B) increase; decrease; increase
C) decrease; decrease; decrease
D) decrease; increase; increase
E) decrease; increase; decrease - CORRECT ANSWER - B) increase; decrease; increase
The most important factor for regulating respiratory rate is
A) bicarbonate ions in blood
B) carbonic acid in blood
C) carbon dioxide levels in blood
D) oxygen levels in blood - CORRECT ANSWER - C) carbon dioxide levels in blood
ACTUAL Exam Questions and CORRECT
Answers
A patient has a defect in mucus production. What outcome(s) do you predict may occur as a
consequence? Select all that apply.
A) Cold, dry air damages the trachea and lungs.
B) Germs invade the respiratory tract.
C) Warm, humid air damages the trachea and lungs.
D) Dust accumulates in the respiratory tract.
E) Residual Volume will decrease.
F) Respiration improves due to less obstruction.
G) Tidal Volume will increase.
H) Vital Capacity will increase. - CORRECT ANSWER - A) Cold, dry air damages the
trachea and lungs.
B) Germs invade the respiratory tract.
D) Dust accumulates in the respiratory tract.
Why is cigarette smoking a "double whammy" for the lungs?
A) Tar and chemicals make cells vulnerable, and low mucus lets germs in.
B) Tar and chemicals paralyze cilia, but also lead to excessive mucus production.
C) Smoke and nicotine clog alveoli.
D) Tar and nicotine activate acetylcholine receptors. - CORRECT ANSWER - B) Tar and
chemicals paralyze cilia, but also lead to
Fish use gills to extract oxygen from water, where it is at concentrations less than 1%. Yet if they
are pulled out of the water, they cannot breathe air with 21% oxygen. What is the most likely
explanation?
A) The gill arches immediately dry out, preventing gas exchange
, B) The gill lamellae are killed from the toxic high levels of oxygen in the air
C) The gills do in fact function to extract oxygen from air, but they require water to exhale
carbon dioxide
D) Without water to support them, gill filaments collapse and lose surface area - CORRECT
ANSWER - D) Without water to support them, gill filaments collapse and lose surface
area
When CO2 levels increase in the blood, what happens to the blood? Select all that apply.
A) hydrogen ion concentration decreases
B) pH increases
C) blood becomes more acidic
D) pH decreases
E) blood becomes basic - CORRECT ANSWER - C) blood becomes more acidic
D) pH decreases
A(n) ____ in blood CO2 will cause a(n) ____ in blood pH. This leads to a(n) ____ in breathing
rates.
A) increase; increase; increase
B) increase; decrease; increase
C) decrease; decrease; decrease
D) decrease; increase; increase
E) decrease; increase; decrease - CORRECT ANSWER - B) increase; decrease; increase
The most important factor for regulating respiratory rate is
A) bicarbonate ions in blood
B) carbonic acid in blood
C) carbon dioxide levels in blood
D) oxygen levels in blood - CORRECT ANSWER - C) carbon dioxide levels in blood
