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Anatomy and Physiology > Week 9 Respiratory System > Flashcards

Week 9 Respiratory System Flashcards

1
Q 
The nasal cavity is indicated by \_\_\_\_\_\_\_\_.
A) Label D
B) Label C
C) Label B
D) Label H
E) Label A
A

E) Label A

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2
Q 
The right main (primary) bronchus is indicated by \_\_\_\_\_\_\_\_.
A) Label H
B) Label I
C) Label J
D) Label B
E) Label F
A

A) Label H

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3
Q 
The trachea is indicated by \_\_\_\_\_\_\_\_.
A) Label D
B) Label I
C) Label B
D) Label F
E) Label G
A

B) Label I

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4
Q 
The diaphragm muscle is indicated by \_\_\_\_\_\_\_\_.
A) Label C
B) Label E
C) Label F
D) Label G
E) Label J
A

D) Label G

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5
Q 
The oral cavity is indicated by \_\_\_\_\_\_\_\_.
A) Label C
B) Label A
C) Label E
D) Label B
E) Label G
A

A) Label C

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6
Q 
The inferior lobe of the right lung is indicated by \_\_\_\_\_\_\_\_.
A) Label E
B) Label J
C) Label I
D) Label G
E) Label F
A

E) Label F

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7
Q 
The nostrils, or nares, are indicated by \_\_\_\_\_\_\_\_.
A) Label C
B) Label G
C) Label B
D) Label A
E) Label F
A

C) Label B

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8
Q 
The apex of the right lung is indicated by \_\_\_\_\_\_\_\_.
A) Label E
B) Label F
C) Label H
D) Label G
E) Label J
A

A) Label E

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9
Q 
The larynx is indicated by \_\_\_\_\_\_\_\_.
A) Label H
B) Label G
C) Label F
D) Label A
E) Label D
A

E) Label D

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10
Q 
The pharynx is indicated by \_\_\_\_\_\_\_\_.
A) Label H
B) Label I
C) Label J
D) Label F
E) Label B
A

C) Label J

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11
Q

Which of the following is not a function of the mucosa lining the nasal conchae and nasal cavity?
A) Serve as a partition between the oral and nasal cavities
B) Warm incoming air as it flows into the nasal cavity
C) Trap incoming bacteria and debris and prevent it from reaching the lungs
D) Moisten air as it flows into the nasal cavity

A

A) Serve as a partition between the oral and nasal cavities

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12
Q 
The anterior portion of the palate that is supported by bone is called the \_\_\_\_\_\_\_\_.
A) soft palate
B) glottis
C) epiglottis
D) hard palate
A

D) hard palate

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13
Q

From superior to inferior, the three regions of the pharynx are the ________.
A) oropharynx, nasopharynx, laryngopharynx
B) nasopharynx, oropharynx, laryngopharynx
C) laryngopharynx, oropharynx, nasopharynx
D) nasopharynx, laryngopharynx, oropharynx

A

B) nasopharynx, oropharynx, laryngopharynx

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14
Q 
Which tonsil sits at the base of the tongue? 
A) Lingual
B) Tubal
C) Pharyngeal
D) Palatine
A

A) Lingual

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15
Q 
What part of the respiratory system routes air and food into their proper channels and plays a 
role in speech?
A) Tongue
B) Pharynx
C) Nasal conchae
D) Larynx
A

D) Larynx

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16
Q 
What flap of elastic cartilage protects the superior opening of the larynx? 
A) Trachea
B) Epiglottis
C) Glottis
D) Thyroid cartilage
A

B) Epiglottis

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17
Q 
When we swallow food or drink, what prevents the passage of these items into our larynx 
and lower respiratory passageways?
A) Thyroid cartilage
B) Epiglottis
C) Glottis
D) Cilia
A

B) Epiglottis

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18
Q 
When breathing in, air enters the larynx through an opening called the \_\_\_\_\_\_\_\_.
A) glottis
B) epiglottis
C) esophagus
D) thyroid cartilage
A

A) glottis

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19
Q 
Which tissue forms the C-shaped rings that reinforce the trachea?
A) Fibrocartilage
B) Elastic cartilage
C) Hyaline cartilage
D) Compact bone
A

C) Hyaline cartilage

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20
Q 
The primary purpose for a tracheostomy would be to allow the patient to \_\_\_\_\_\_\_\_.
A) talk
B) cough
C) swallow
D) breathe
A

D) breathe

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21
Q 
Damage to the larynx can cause an inability to \_\_\_\_\_\_\_\_. 
A) sneeze
B) cough
C) speak
D) hiccup
A

C) speak

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22
Q 
The serous membrane that surrounds each lung is created by a parietal and visceral \_\_\_\_\_\_\_\_.
A) pleura
B) pericardium
C) peritoneum
D) mediastinum
A

A) pleura

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23
Q 
Which passageways branch off of the inferior end of the trachea?
A) Bronchioles
B) Bronchi
C) Alveolar ducts
D) Alveolar sacs
A

B) Bronchi

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24
Q 
What are the smallest conducting passageways of the lungs that lead into the alveoli?
A) Main (primary) bronchi
B) Trachea
C) Terminal bronchioles
D) Alveolar ducts
A

C) Terminal bronchioles

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25
Q 
Which zone includes the respiratory bronchioles, alveolar ducts, alveolar sacs, and alveoli 
and is where gas exchange occurs? 
A) Respiratory zone
B) Conducting zone
C) Terminal zone
D) Filtering zone
A

A) Respiratory zone

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26
Q 
The process of moving air into and out of the lungs is commonly called breathing or \_\_\_\_\_\_\_\_.
A) cellular respiration
B) internal respiration
C) respiratory gas transport
D) pulmonary ventilation
A

D) pulmonary ventilation

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27
Q 
Which two variables dictate the mechanics of breathing (pulmonary ventilation)? 
A) Temperature and volume
B) Pressure and volume
C) Diffusion and osmosis
D) Pressure and temperature
A

B) Pressure and volume

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28
Q 
Which inspiratory muscles contract so we can inspire air?
A) Rectus abdominis; external obliques
B) Diaphragm; external intercostals
C) Trapezius; latissimus dorsi
D) Diaphragm; external obliques
A

B) Diaphragm; external intercostals

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29
Q

In order to expire air, which of the following must occur?
A) Intrapulmonary pressure and atmospheric pressure equalize.
B) Atmospheric pressure rises higher than intrapulmonary pressure.
C) Intrapulmonary pressure drops lower than atmospheric pressure.
D) Intrapulmonary volume decreases as the inspiratory muscles and diaphragm relax and return
to their resting positions.

A

D) Intrapulmonary volume decreases as the inspiratory muscles and diaphragm relax and return
to their resting positions.

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30
Q 
\_\_\_\_\_\_\_\_ volume is the air moved into and out of the lungs during normal quiet breathing 
and is approximately 500 ml of air.
A) Tidal
B) Expiratory reserve
C) Residual
D) Inspiratory reserve
A

A) Tidal

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31
Q 
Which of the following respiratory volumes is the largest? 
A) Expiratory reserve volume (ERV) 
B) Inspiratory reserve volume (IRV) 
C) Tidal volume (TV)
D) Vital capacity (VC)
A

D) Vital capacity (VC)

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32
Q 
What nonrespiratory air movement is intended to ventilate all alveoli?
A) Cough
B) Hiccup
C) Yawn
D) Sneeze
A

C) Yawn

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33
Q 
In the pulmonary circuit, which gas diffuses from the blood of the pulmonary capillaries into 
the alveoli to be exhaled?
A) Nitrous oxide
B) Oxygen
C) Carbon dioxide
D) Carbon monoxide
A

C) Carbon dioxide

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34
Q 
What is the most common transport method for carbon dioxide?
A) Oxyhemoglobin
B) Deoxyhemoglobin
C) Carbon monoxide
D) Bicarbonate ions
A

D) Bicarbonate ions

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35
Q 
The normal respiratory rate of 12–15 breaths per minute is known as \_\_\_\_\_\_\_\_.
A) hyperpnea
B) eupnea
C) dyspnea
D) apnea
A

B) eupnea

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36
Q 
What portions of the brain contain respiratory centers and set the breathing rate?
A) Medulla and pons
B) Pons and cerebellum
C) Cerebrum and cerebellum
D) Thalamus and hypothalamus
A

A) Medulla and pons

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37
Q 
The regulation of the activity of the breathing muscles, the diaphragm and external intercostals, is controlled by nerve impulses transmitted from the brain via the \_\_\_\_\_\_\_\_ and \_\_\_\_\_\_\_\_ nerves.
A) splanchnic; sacral
B) trochlear; trigeminal
C) phrenic; intercostal
D) cranial; spinal
A

C) phrenic; intercostal

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38
Q 
The most important stimulus for breathing in a healthy person is the body's need to rid itself 
of the blood gas called \_\_\_\_\_\_\_\_.
A) carbon dioxide
B) oxygen
C) methane
D) nitrous oxide
A

A) carbon dioxide

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39
Q 
When we exercise, carbon dioxide levels increase in our blood, which leads to a decrease in blood pH. How will the respiratory system respond to restore carbon dioxide and blood pH levels to normal? 
A) Hypoventilation
B) Hyperventilation
C) Apnea
D) Dyspnea
A

B) Hyperventilation

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40
Q

What fatty molecule is made by cuboidal-shaped cells in the epithelium of the alveoli to
reduce surface tension and prevent alveolar collapse between breaths?
A) Sebum
B) Surfactant
C) Nicotine
D) Mucus

A

B) Surfactant

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41
Q 
Which organ or structure belongs to the lower respiratory tract? 
A) Nose
B) Pharynx
C) Larynx
D) Trachea
E) Nasal cavity
A

D) Trachea

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42
Q 
The respiratory conducting passageways perform all of the following functions except\_\_\_\_\_\_\_\_.
A) allow air to reach the lungs
B) purify air
C) humidify air
D) exchange gases
E) warm incoming air
A

D) exchange gases

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43
Q 
What sweeps contaminated mucus from the nasal cavity to the throat?
A) Tonsils
B) Flagella
C) Cilia
D) Coarse hairs
E) Air turbulence
A

C) Cilia

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44
Q

What is the role of mucus in the nasal cavity?
A) Increase the air turbulence in the nasal cavity
B) Separate the oral cavity from the nasal cavity
C) Lighten the skull
D) Act as a resonance chamber for speech
E) Trap incoming bacteria and other foreign debris

A

E) Trap incoming bacteria and other foreign debris

45
Q

The nasal cavity is separated from the oral cavity by ________.
A) the pharynx
B) the nasal conchae
C) the larynx
D) both the hard and soft palate
E) both the nasal conchae and hard palate

A

D) both the hard and soft palate

46
Q 
Which bone does not contain a paranasal sinus?
A) Frontal
B) Sphenoid
C) Mandible
D) Ethmoid
E) Maxilla
A

C) Mandible

47
Q

What role do the tonsils play in the respiratory system?
A) Tonsils produce mucus, which drains into the nasal cavities.
B) Tonsils humidify and warm incoming air.
C) Tonsils moisten the air entering the respiratory passageways.
D) Tonsils protect the body from infection.
E) Tonsils sweep contaminated mucus toward the throat.

A

D) Tonsils protect the body from infection.

48
Q 
Which region of the throat houses the pharyngeal tonsil (adenoid)? 
A) Nasopharynx
B) Oropharynx
C) Palatopharynx
D) Laryngopharynx
E) Tracheopharynx
A

A) Nasopharynx

49
Q 
The pharyngotympanic tubes, which drain the middle ear, open into the \_\_\_\_\_\_\_\_.
A) nasopharynx
B) oropharynx
C) palatopharynx
D) laryngopharynx
E) tracheopharynx
A

A) nasopharynx

50
Q

The correct pathway air flows through the respiratory system is ________.
A) nose, pharynx, larynx, trachea, main (primary) bronchi
B) nose, larynx, pharynx, trachea, main (primary) bronchi
C) nose, pharynx, trachea, larynx, main (primary) bronchi
D) nose, larynx, trachea, pharynx, main (primary) bronchi
E) nose, pharynx, larynx, main (primary) bronchi, trachea

A

A) nose, pharynx, larynx, trachea, main (primary) bronchi

51
Q

In rare cases of vocal cord paralysis, the vocal cords will not be able to move. This can impair ________.
A) speaking and breathing
B) the ability to smell
C) the ability to taste
D) the action of cilia in the nasal cavity
E) the sneeze reflex

A

A) speaking and breathing

52
Q

Smoking destroys cilia in the respiratory passageways, such as the trachea. Which of the following is a likely consequence of damaged cilia?
A) Inflammation and swelling of the tonsils
B) Air is not moistened, warmed, or filtered before reaching the lungs
C) Inability to propel mucus from the lungs to the throat
D) Nasal congestion and postnasal drip
E) Inability to produce mucus

A

C) Inability to propel mucus from the lungs to the throat

53
Q

How do goblet cells, present in the lining of the trachea, contribute to the protection of the respiratory system?
A) Goblet cells create a sweeping motion that propels mucus toward the throat.
B) Goblet cells create a patent airway.
C) Goblet cells protect the superior opening of the larynx by preventing the entry of food and
fluids into the larynx.
D) Goblet cells produce mucus that traps dust particles and other debris.
E) Goblet cells vibrate to allow us to speak.

A

D) Goblet cells produce mucus that traps dust particles and other debris.

54
Q 
Vibration due to exhaled air that results in speech is a function of the \_\_\_\_\_\_\_\_.
A) trachea
B) larynx
C) pharynx
D) glottis
E) epiglottis
A

B) larynx

55
Q 
The superior portion of each lung is the \_\_\_\_\_\_\_\_.
A) pleura
B) base
C) apex
D) mediastinum
E) fissure
A

C) apex

56
Q 
A needle piercing into the thorax to perform a lung biopsy would travel first through the \_\_\_\_\_\_\_\_.
A) parietal pleura
B) visceral pleura
C) visceral pericardium
D) alveoli
E) parietal pericardium
A

A) parietal pleura

57
Q

Which one of the following is not true of the lungs?
A) The narrower portion of each lung is called the apex.
B) The bases rest on the diaphragm.
C) The left lung has two lobes.
D) The right lung has three lobes.
E) Both lungs have two lobes.

A

E) Both lungs have two lobes.

58
Q

What is the function of an alveolar macrophage?
A) Secrete mucus
B) Facilitate gas exchange
C) Produce surfactant
D) Engulf bacteria, carbon particles, and debris
E) Sweep contaminated mucus and debris from the alveoli

A

D) Engulf bacteria, carbon particles, and debris

59
Q 
Which of the following is part of the conducting zone?
A) Respiratory bronchioles
B) Alveolar ducts
C) Alveolar sacs
D) Alveoli
E) Primary bronchus
A

E) Primary bronchus

60
Q 
Which of the following is not one of the four main events of respiration?
A) Pulmonary ventilation
B) Respiratory gas transport
C) Residual volume
D) External respiration
E) Internal respiration
A

C) Residual volume

61
Q 
Exchange of both oxygen and carbon dioxide through the respiratory membrane occurs by \_\_\_\_\_\_\_\_.
A) osmosis
B) simple diffusion
C) facilitated diffusion
D) active transport
E) endocytosis
A

B) simple diffusion

62
Q

What forms the respiratory membrane (air-blood barrier)?
A) Respiratory bronchioles and alveoli
B) Terminal bronchioles and respiratory bronchioles
C) Systemic capillaries and cells of the body
D) The visceral and parietal pleura
E) The fused basement membranes of alveolar and pulmonary capillary walls

A

E) The fused basement membranes of alveolar and pulmonary capillary walls

63
Q

The major function of the respiratory system is to ________.
A) transport oxygen and carbon dioxide to and from the lungs and tissue cells of the body
B) transport escaped fluids back to the cardiovascular system
C) circulate oxygen-rich blood around the body
D) supply the body with oxygen and dispose of carbon dioxide
E) perform a gas exchange between the blood and the cells of the body

A

D) supply the body with oxygen and dispose of carbon dioxide

64
Q

Which one of the following is not true of inspiration?
A) Contraction of the diaphragm muscle helps increase the size of the thoracic cavity.
B) Relaxation of the external intercostal muscles helps increase the size of the thoracic cavity.
C) Increased intrapulmonary volume causes inhaled gases to spread out.
D) The decreased gas pressure produces a partial vacuum that forcibly sucks air in.
E) Air continues to move into the lungs until intrapulmonary pressure equals atmospheric
pressure.

A

B) Relaxation of the external intercostal muscles helps increase the size of the thoracic cavity.

65
Q

Expiration (exhalation) occurs when ________.
A) the diaphragm and intercostal muscles contract
B) air moves into the lungs
C) intrapulmonary volume increases
D) the diaphragm and intercostal muscles relax
E) intrapulmonary pressure decreases

A

D) the diaphragm and intercostal muscles relax

66
Q 
Which nonrespiratory air movement clears the upper respiratory passageways?
A) Coughing
B) Yawning
C) Laughing
D) Hiccupping
E) Sneezing
A

E) Sneezing

67
Q

Harry prepares to take a dive to the bottom of the pool to pick up a toy. What must happen for him to take a deep breath of air?
A) The intrapulmonary volume in the lungs decreases.
B) The abdominal muscles contract.
C) The intrapulmonary pressure inside the lungs increases.
D) The diaphragm moves superiorly, becoming elevated and dome-shaped.
E) Both the diaphragm and external intercostal muscles contract.

A

E) Both the diaphragm and external intercostal muscles contract.

68
Q 
The respiratory movement representing the total amount of exchangeable air is the \_\_\_\_\_\_\_\_.
A) tidal volume
B) inspiratory reserve volume
C) expiratory reserve volume
D) vital capacity
E) dead space volume
A

D) vital capacity

69
Q 
Even after a forceful expiration, air still remains in the lungs for gas exchange to continue. 
This volume is about \_\_\_\_\_\_\_\_.
A) 500 ml
B) 1,200 ml
C) 2,100 ml
D) 4,800 ml
E) 6,000 ml
A

B) 1,200 ml

70
Q 
The amount of air exchanged during normal quiet breathing is about \_\_\_\_\_\_\_\_.
A) 500 ml
B) 1,200 ml
C) 2,100 ml
D) 4,800 ml
E) 6,000 ml
A

A) 500 ml

71
Q 
Oxygen diffuses from the blood stream into surrounding cells and tissues during \_\_\_\_\_\_\_\_.
A) internal respiration
B) pulmonary ventilation
C) external respiration
D) respiratory gas transport
E) tidal volume
A

A) internal respiration

72
Q 
Oxygen is primarily transported in the blood as \_\_\_\_\_\_\_\_.
A) bicarbonate ion
B) oxyhemoglobin
C) carbonic acid
D) deoxyhemoglobin
E) carbonic anhydrase
A

B) oxyhemoglobin

73
Q 
Which nerves stimulate the diaphragm and external intercostal muscles to contract? 
A) Splanchnic nerves
B) Somatic nerves
C) Phrenic and intercostal nerves
D) Vagus nerves
E) Myenteric nerves
A

C) Phrenic and intercostal nerves

74
Q 
When Jamie fell, she hit her head and damaged her respiratory center. She began to hypoventilate. Which part(s) of her brain sustained injury?
A) Thalamus
B) Hypothalamus and pituitary gland
C) Medulla oblongata and pons
D) Cerebellum
E) Midbrain
A

C) Medulla oblongata and pons

75
Q 
Hypoventilation dramatically increases carbonic acid concentration and involves \_\_\_\_\_\_\_\_.
A) extremely deep breathing
B) extremely fast breathing
C) extremely slow breathing
D) intermittent breathing
E) irregular breathing
A

C) extremely slow breathing

76
Q

Which of the following houses neurons that ultimately stimulate the diaphragm and external intercostal muscles to initiate inspiration?
A) Dorsal respiratory group (DRG) of the medulla oblongata
B) Arbor vitae of the cerebellum
C) Ventral respiratory group (VRG) of the medulla oblongata
D) Pons respiratory centers
E) Corpora quadrigemina of the midbrain

A

C) Ventral respiratory group (VRG) of the medulla oblongata

77
Q

Five-year-old Josiah is mad at his mother and is holding his breath. His body will eventually force him to breathe again due to ________.
A) increased oxygen levels in the blood
B) increased blood pH
C) increased carbon dioxide blood levels and decreased blood pH
D) increased electrolyte concentration in the blood
E) decreased carbon dioxide blood levels

A

C) increased carbon dioxide blood levels and decreased blood pH

78
Q 
Which of these disorders is related to loss of elasticity of the lungs?
A) Asthma
B) Emphysema
C) Tuberculosis
D) Pneumonia
E) Sudden infant death syndrome (SIDS)
A

B) Emphysema

79
Q

Which one of the following is not true of lung cancer?
A) Lung cancer is the leading cause of cancer deaths in the United States.
B) Lung cancer slows down the movement of cilia.
C) Lung cancer only occurs in smokers.
D) Lung cancer is aggressive.
E) Lung cancers often metastasize rapidly and widely.

A

C) Lung cancer only occurs in smokers.

80
Q

Helene started coughing when her epiglottis did not close completely while swallowing her
drink. Later, she commented the drink went down the “wrong pipe.” Given your knowledge of
the anatomy of the respiratory system, deduce where the drink traveled.
A) Esophagus
B) Nasal cavity
C) Larynx
D) Pharynx
E) Oral cavity

A

C) Larynx

81
Q

TRUE OR FALSE

Olfactory receptors are located in the mucosa in the nasal cavity.

A

TRUE

82
Q

TRUE OR FALSE

The nasal cavity is separated from the oral cavity by the nasal conchae.

A

FALSE

83
Q

TRUE OR FALSE

sinuses warm, cleanse, and humidify air entering the nasal cavity.

A

FALSE

84
Q

TRUE OR FALSE

The tubal tonsils protect the openings of the pharyngotympanic tubes in the nasopharynx.

A

TRUE

85
Q

TRUE OR FALSE

The opening between the vocal cords is known as the epiglottis.

A

FALSE

86
Q

TRUE OR FALSE
The larynx routes air and food into their proper channel and plays an important role in
speech production.

A

TRUE

87
Q

TRUE OR FALSE

Cilia lining the trachea propel mucus toward the lungs.

A

FALSE

88
Q

TRUE OR FALSE
The function of the C-rings of hyaline cartilage in the trachea is to keep the airway patent or
open for breathing.

A

TRUE

89
Q

TRUE OR FALSE
The Heimlich maneuver is a procedure in which air in a person’s own lungs is used to eject
an obstructing piece of food.

A

TRUE

90
Q 
TRUE OR FALSE
Each main (primary) bronchus enters the lung at the apex.
A

FALSE

91
Q

TRUE OR FALSE
The parietal pleurae cover the surface of each lung while the visceral pleurae line the wall of
the thoracic cavity.

A

FALSE

92
Q

TRUE OR FALSE

The bronchioles are the smallest of the conducting passageways in the lungs.

A

TRUE

93
Q

TRUE OR FALSE

The respiratory zone is the only site of gas exchange within the lungs.

A

TRUE

94
Q

TRUE OR FALSE

The respiratory membrane is the air-blood barrier, where gases are exchanged.

A

TRUE

95
Q

TRUE OR FALSE
Alveolar macrophages patrol the alveoli to engulf and remove bacteria, carbon particles, and
other debris.

A

TRUE

96
Q

TRUE OR FALSE

Cellular respiration uses carbon dioxide to produce ATP and oxygen.

A

FALSE

97
Q

TRUE OR FALSE

Both inspiration and expiration are active processes requiring muscle contractions.

A

FALSE

98
Q

TRUE OR FALSE
Expiration occurs when the thoracic and intrapulmonary volumes decrease and the
intrapulmonary pressure increases.

A

TRUE

99
Q

TRUE OR FALSE

The amount of air that can be forcibly exhaled beyond a tidal expiration is around 1,200 ml.

A

TRUE

100
Q

TRUE OR FALSE

Normal quiet breathing, known as tidal volume, is around 500 ml of air.

A

TRUE

101
Q

TRUE OR FALSE
Laughing and crying similarly involve inspiration followed by a release of air in a number
of short expirations.

A

TRUE

102
Q

TRUE OR FALSE
Bronchial sounds are produced as air fills the alveoli of the lungs while vesicular breathing
sounds are produced by air rushing through the large respiratory passageways of the trachea and
bronchi.

A

FALSE

103
Q

TRUE OR FALSE

Wheezing is a whistling sound associated with diseased respiratory tissue, mucus, or pus.

A

TRUE

104
Q

TRUE OR FALSE

The loading of carbon dioxide into the blood occurs during external respiration.

A

FALSE

105
Q

TRUE OR FALSE
People who experience hypoxia produce characteristic signs of cyanosis and respiratory
distress.

A

TRUE

106
Q

TRUE OR FALSE

Venous blood in systemic circulation is poorer in oxygen and richer in carbon dioxide.

A

TRUE

107
Q

TRUE OR FALSE

results from exercise when breathing becomes deeper and more vigorous.

A

TRUE

108
Q

TRUE OR FALSE
prevents lung collapse since it lowers surface tension of the film of water lining
each alveolar air sac.

A

TRUE

109
Q

TRUE OR FALSE

Changes in oxygen levels in the blood are the most important stimuli for breathing in a
healthy person

A

FALSE

Anatomy and Physiology (14 decks)

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