Question 1

Scuba divers breathe a nitrogen-oxygen mixture rather than pure compressed oxygen in order to avoid what condition?

Accepted Answer

A)   The bends
B)   Oxygen toxicity
C)   Rapture of the deep
D)   Caisson disease
E)   Hypoxemic hypoxiaF) B) and E)
G) A) and B)

Question 2

How is alveolar air different than inspired air?

Accepted Answer

A)   Alveolar air has a higher PN2 than inspired air.
B)   Alveolar air has a lower PCO2 than inspired air.
C)   Alveolar air has a higher PO2 than inspired air.
D)   Alveolar air has a higher PH2O than inspired air.E) None of the above
F) B) and D)

Question 3

What is the least common but most dangerous form of lung cancer?

Accepted Answer

A)   Mesothelioma
B)   Adenocarcinoma
C)   Squamous cell carcinoma
D)   Small-cell carcinomaE) B) and D)
F) None of the above

Question 4

Nitrogen bubbles can form in the blood and other tissues when a scuba diver ascends too rapidly,producing a syndrome called _________.

Accepted Answer

A)   decompression sickness
B)   hyperbaric disease
C)   cerebral embolism
D)   pulmonary barotrauma
E)   pulmonary edemaF) All of the above
G) A) and D)

Question 5

The nose is divided into right and left halves called the __________.

Accepted Answer

A)   nasal cavities
B)   nasal fossae
C)   nasal septa
D)   nasal vestibules
E)   nasal aperturesF) A) and D)
G) None of the above

Question 6

During exercise,which of the following directly increases respiratory rate?

Accepted Answer

A)   Increased H+ level in the blood
B)   The Bohr effect
C)   Reduced blood pH
D)   Reduced oxyhemoglobin
E)   Anticipation of the needs of exercising muscleF) D) and E)
G) All of the above

Question 7

Among its other purposes,how is the Valsalva maneuver used?

Accepted Answer

A)   To aid in defecation and urination
B)   As part of the procedure for giving CPR to a person in respiratory arrest
C)   To ventilate the lungs during eupnea
D)   To expel more than the usual tidal volume from the lungs
E)   To clear carbon monoxide from the body and replace it with oxygenF) A) and E)
G) D) and E)

Question 8

The blood transports more CO2 in the form of ___________ than in any other form.

Accepted Answer

A)   carbaminohemoglobin
B)   carboxyhemoglobin
C)   bicarbonate ions
D)   dissolved CO2 gas
E)   bisphosphocarbonateF) B) and C)
G) B) and E)

Question 9

Deep,rapid breathing often seen in terminal diabetes mellitus is known as what?

Accepted Answer

A)   Tachypnea
B)   Dyspnea
C)   Orthopnea
D)   Hyperpnea
E)   Kussmaul respirationF) A) and C)
G) All of the above

Question 10

Output from higher brain centers can bypass both the DRG and VRG and go directly to __________,which controls the accessory muscles of respiration.

Accepted Answer

A)   the diaphragm
B)   spinal integration centers
C)   the cerebral cortex
D)   the vagus nerveE) B) and D)
F) B) and C)

Question 11

What is the basic distinction between an alveolar duct and an alveolar atrium?

Accepted Answer

A)   Their shape
B)   Their size
C)   Their function
D)   Their epithelial type
E)   The presence or absence of ciliaF) A) and B)
G) A) and C)

Question 12

Metabolically active tissues have which of the following sets of conditions that shift the oxyhemoglobin dissociation curve to the right?

Accepted Answer

A)   ↑ PO2,↓ PCO2,↑ temperature,↑ BPG
B)   ↓ PO2,↑ PCO2,↑ temperature,↑ BPG
C)   ↓ PO2,↑ PCO2,↓ temperature,↑ BPG
D)   ↑ PO2,↓ PCO2,↑ temperature,↓ BPGE) None of the above
F) A) and B)

Question 13

The heart indents into the __________ of the left lung.

Accepted Answer

A)   oblique fissure
B)   hilum
C)   apex
D)   cardiac notch
E)   baseF) B) and C)
G) A) and E)

Question 14

Normally,the systemic arterial blood has a PO2 of ___________ mm Hg,a PCO2 of ___________ mm Hg,and a pH of ___________.

Accepted Answer

A)   40;95;7.4
B)   95;40;7.4
C)   7.4;40;95
D)   95;7.4;40
E)   40;7.4;95F) A) and C)
G) D) and E)

Question 15

Each hemoglobin molecule can transport up to __________ oxygen molecules.

Accepted Answer

A)   6
B)   2
C)   3
D)   4
E)   5F) A) and B)
G) B) and E)

Question 16

The serratus anterior is active in eupnea.

Accepted Answer

A) True 
 B)False

Question 17

Air consists of about 78.6% nitrogen,20.9% oxygen,0.04% carbon dioxide,and 0.5% water.At sea level, (760 mmHg) what is the PCO2?

Accepted Answer

A)   597 mm Hg
B)   159 mm Hg
C)   0.3 mm Hg
D)   3.7 mm HgE) B) and D)
F) A) and B)

Question 18

Emotional states are integrated by the __________,which generates an output that creates such respiratory variations as laughing and crying.

Accepted Answer

A)   VRG
B)   PRG
C)   DRG
D)   SRGE) A) and D)
F) A) and C)

Question 19

Breathing is controlled solely by the medulla oblongata and pons.

Accepted Answer

A) True 
 B)False

Question 20

The vagus and glossopharyngeal nerves carry afferent signals from peripheral chemoreceptors to a chemosensitive area in the ___________.

Accepted Answer

A)   pontine respiratory group
B)   dorsal respiratory group
C)   ventral respiratory group
D)   medulla oblongata
E)   ponsF) A) and C)
G) B) and C)

Exam 22: The Respiratory System

How is alveolar air different than inspired air?

Correct AnswerverifiedShow Answer

During exercise,which of the following directly increases respiratory rate?

Correct AnswerverifiedShow Answer

Scuba divers breathe a nitrogen-oxygen mixture rather than pure compressed oxygen in order to avoid what condition?

Correct AnswerverifiedShow Answer

Among its other purposes,how is the Valsalva maneuver used?

Correct AnswerverifiedShow Answer

The vagus and glossopharyngeal nerves carry afferent signals from peripheral chemoreceptors to a chemosensitive area in the ___________.

Correct AnswerverifiedShow Answer

What is the least common but most dangerous form of lung cancer?

Correct AnswerverifiedShow Answer

Normally,the systemic arterial blood has a PO2 of ___________ mm Hg,a PCO2 of ___________ mm Hg,and a pH of ___________.

Correct AnswerverifiedShow Answer

Deep,rapid breathing often seen in terminal diabetes mellitus is known as what?

Correct AnswerverifiedShow Answer

Breathing is controlled solely by the medulla oblongata and pons.

Correct AnswerverifiedShow Answer

Emotional states are integrated by the __________,which generates an output that creates such respiratory variations as laughing and crying.

Correct AnswerverifiedShow Answer

Output from higher brain centers can bypass both the DRG and VRG and go directly to __________,which controls the accessory muscles of respiration.

Correct AnswerverifiedShow Answer

What is the basic distinction between an alveolar duct and an alveolar atrium?

Correct AnswerverifiedShow Answer

Air consists of about 78.6% nitrogen,20.9% oxygen,0.04% carbon dioxide,and 0.5% water.At sea level, (760 mmHg) what is the PCO2?

Correct AnswerverifiedShow Answer

Nitrogen bubbles can form in the blood and other tissues when a scuba diver ascends too rapidly,producing a syndrome called _________.

Correct AnswerverifiedShow Answer

The serratus anterior is active in eupnea.

Correct AnswerverifiedShow Answer

Each hemoglobin molecule can transport up to __________ oxygen molecules.

Correct AnswerverifiedShow Answer

Metabolically active tissues have which of the following sets of conditions that shift the oxyhemoglobin dissociation curve to the right?

Correct AnswerverifiedShow Answer

The nose is divided into right and left halves called the __________.

Correct AnswerverifiedShow Answer

The blood transports more CO2 in the form of ___________ than in any other form.

Correct AnswerverifiedShow Answer

The heart indents into the __________ of the left lung.

Correct AnswerverifiedShow Answer

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Normally,the systemic arterial blood has a PO₂ of _____ mm Hg,a PCO₂ of _ mm Hg,and a pH of _______.

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Air consists of about 78.6% nitrogen,20.9% oxygen,0.04% carbon dioxide,and 0.5% water.At sea level, (760 mmHg) what is the PCO₂?

Correct Answer
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The blood transports more CO₂ in the form of ___________ than in any other form.

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