week 3 - have fun. Flashcards
1
Q
what is the major function of the respiratory system
A
to supply the body with oxygen and dispose of carbon dioxide
2
Q
what happens during pulmonary ventilation
A
air is moved into and out fo the lungs so the gases there are continuously changed and refreshed
3
Q
what happens during external respiration
A
oxygen diffuses from the lungs to the blood, and carbon dioxide diffuses from the blood to the lungs
4
Q
what happens during the transport of respiratory gases
A
oxygen is transported from the lungs to the tissue cells of the body, and carbon dioxide is transported from the tissue cells to the lungs
5
Q
what happens during internal respiration
A
oxygen diffuses from blood to tissue cells, and carbon dioxide diffuses from tissue cells to blood
6
Q
what are the four processes of respiration
A
pulmonary ventilation, external respiration, transport of respiratoy gases, and internal respiration
7
Q
the actual use of oxygen and production of carbon dioxide by tissue cells is known as_
A
cellular respiration
8
Q
what are the structures that form the respiratory passageways
A
nose, nasal cavity, paranasal sinuses, pharynx, larynx, trachea, bronchi, & lungs
9
Q
what are the two zones the respiratory system is divided into
A
the respiratory zone & the conducting zone
10
Q
which zone is the zone that consists of those structures where gas exchange occurs
A
the respiratory zone
11
Q
which zone is composed of the respiratory bronchioles, alveolar ducts, alveolar sacs and alveoli?
A
the respiratory zone
12
Q
which zone includes the structures that filter, warm, and moisten air and conduct air into the lungs
A
the conducting zone
13
Q
what do the conducting zone organs do
A
cleanse, humidify, and warm incoming air
14
Q
what are the five functions of the nose
A
- provides an airway for respiration, 2. moistens and warms entering air, 3. filters and cleans inspired air, 4. serves as a resonating chamber for speech, 5. houses the olfactory receptors
15
Q
the cardiovascular system and respiratory system cooperate in order to:
A
- supply oxygen, which is required by cells to produce ATP, 2. eliminate carbon dioxide, which produces acidity that is toxic to cells
16
Q
what is the difference between the respiratory system and the cardiovascular system
A
the respiratory system provides for gas exchange, intake of oxgen, and elimination of carbon dioxide, while the cardiovascular system transports these gases in the blood between the lungs and the body’s cells
17
Q
what would happen if either the respiratory system or cardiovascular system failed
A
failure of one system results in rapid death due to oxygen starvation and accumulation of waste molecules
18
Q
what structures are included in the conducting zone
A
nose, pharynx, larynx, trachea, bronchi, bronchioles, terminal bronchioles
19
Q
what structures are in the upper respiratory system
A
nose, pharynx, structures associated with the previous two
20
Q
what structures are in the lower respiratory system
A
larynx, trachea, bronchi, lungs
21
Q
T/F the respiratory system regulates pH
A
T
22
Q
T/F the respiratory system contains receptors for smell
A
T
23
Q
T/F the respiratory system filters inspired air
A
T
24
Q
T/F the respiratory system produces sound
A
T
25
T/F the respiratory system eliminates some water vapor and heat in exhaled air
T
26
otorhinolaryngology
the medical specialty that deals with the diagnosis and treatment of diseases of the ears, nose, and throat
27
pulmonologist
a specialist in the diagnosis and treatment of lung disease
28
what is the bony frameowrk that makes up the external nose
frontal bone, nasal bones, and maxillae (and flexible hyaline cartilage)
29
what are the two cartilage structures of the nose
septal nasal cartilage, and major and minor alar cartilages
30
what is another name for the nostrils and where do they lead into
external nares; nasal vestibules
31
the internal nose has openings for ducts from what two structures
the paranasal sinuses and the nasolacrimal ducts
32
what happens as air enters the nostrils
it is filtered by course hairs that line the nasal vestibules
33
after air is filtered by the course hairs that line the nasal vestibules, where does it whirl around through
the superior, middle, and inferior meatuses formed by the conchae.
34
as air flows through the nose, does it come into contact with olfactory epithelium
yes
35
air is warmed by_
blood in capillaries
36
air is moistened by_
mucus secreted by goblet cells
37
how is air cleansed
by mucus trapping dust particles. Cilia move the dust-laden mucus toward the pharynx
38
cutting the phrenic nerves will result in what
paralysis of the diaphragm
39
the detergent-like substance that keeps alveoli from collapsing between breaths because it reduces surface tension of the water film in the alveoli is called what?
surfactant
40
what determines the direction of gas movement?
partial pressure gradient
41
when the inspiratory muscles contract what happens?
the size of the thoracic cavity is increased in both length and diameter
42
the nutrient blood supply of the lungs is provided by what?
the bronchial arteries
43
oxygen and carbon dioxide are exchanged in the lungs and through all cell membranes by what?
diffusion
44
what has the greatest stimulating effect on the respiratory centers in the brain?
carbon dioxide
45
damage to which of the following will result in cessation of breathing?
A. the pontine respiratory group
b. the ventral respiratory group of the medulla
c. the stretch receptors in the lungs
d. the dorsal respiratory group of the medulla
b. the ventral respiratory group of the medulla
46
air moving from the nose to the trachea passed by a number of structures. list as many of these as you can.
the structures that air passes by are the nasal cavity, oropharynx, laryngopharynx, and larynx
47
which structure seals the larynx when we swallow?
the epiglottis
48
which structural features of the trachea allow it to expand and contract, yet keep it from collapsing?
a stack of 16-20, incomplete, c-shaped cartilage rings of the trachea allow it to expand and contract and yet keep it from collapsing
49
What features of the alveoli and their respiratory membranes suit them to their function of exchanging gases by diffusion?
the many tiny alveoli together have a large surface area.
| also, the thinness of their respiratory membranes make them ideal for gas exchange
50
a 3 year old boy is brought to the ER after aspiring a peanut. bronchoscopy confirms the suspicion that the peanut is lodged in a bronchus and then it is successfully extracted. which main bronchus was the peanut most likely in?
the peanut was most likely in the right main bronchus because it is wider and more vertical than the left
51
name the two types of circulation in the lungs and their role.
the 2 circulations of the lungs are the pulmonary circulation, which delivers deoxygenated blood to the lungs for oxygenation and returns oxygenated blood to the heart, and the bronchial circulation, which provides systemic (oxygenated) blood to the tissues
52
what is the driving force for pulmonary ventilation?
the driving force for pulmonary ventilation is a pressure gradient created by changes in the thoracic volume
53
premature infants often lack adequate surfactant. how dos this affect their ability to breathe?
a lack of surfactant increases surface tension in the alveoli and causes them to collapse between breaths
54
Lung collapse is prevented by what?
high surface tension of pleural fluid
55
what is the correct route of air flow in the respiratory tract
pharynx, larynx, trachea, bronchi, bronchioles
56
During inspiration, intrapulmonary pressure is greater or less than atmospheric pressure?
less than
57
Pulmonary surfactant is produced by:
type 2 alveolar cells
58
which type of alveolar cells are simple squamous epithelial cells that form a mostly continuous lining of the alveolar wall where gas exchange occurs?
type 1 alveolar cells
59
the pleurae are vital to the integrity of the lungs because:
they produce a lubricating serious secretion, allowing the lungs to glide over the throax wall during breathing
60
What does not diminish lung compliance?
factors that impair the flexibility of the thoracic cage
61
what is not an event necessary to supply the body with O2 and dispose of CO2?
blood pH adjustment
62
What is intrapulmonary pressure?
the difference btw atmospheric pressure and respiratory pressure
63
thyroid cartilage is contained in what structure?
the larynx
64
Vital capacity is what?
the maximum amount of air that can be expired after a maximum inspiratory effort
65
what are the major fxns of the interior nose structures
1. incoming air is warmed, moistened & filtered
2. olfactory stimuli are detected
3. large, hollow resonating chambers modify speech sounds
66
where does the nasal cavity receive its blood supply from
the sphenopalatine branch of the maxillary artery and from the opthalmic artery
67
which nerves innervate the nose
the olfactory nerves and the trigeminal nerves
68
what are the four pairs of paranasal sinuses that mirror one another
1. frontal (palpable) 2. sphenoidal (further back into head) 3. maxillary (under zygoma) 4. ethmoidal (at bridge of nose)
69
the nasal cavity is divided by
the nasal septum, which splits it into right and left halves
70
what does the nasal septum attach to
the vomer and the perpendicular plate of the ethmoid bone
71
where does the pharynx extend from
the base of the skull to the level of C6
72
what is the function of the pharynx
it functions as a passageway for air and food, and provides a resonating chamber for speech sounds, and houses the tonsils
73
what are the three major portions of the pharynx
superior nasopharynx (an air conduit), intermediate oropharynx (passage way for air and food), inferior laryngopharynx (passageway for air and food)
74
where are the tonsils found
in the oropharynx and nasopharynx
75
what is the difference between true and false vocal cords
T: vibrate to produce sound/location: lower ventricular folds of the larynx
F: just for support/location: upper ventricular folds of the larynx
76
in reference to sound waves, the greater the pressure of air,
the louder the sound
77
in reference to sound waves and pitch, the greater the tension on the vocal folds,
the higher the pitch
78
most of the muscles of the pharynx are innervated by nerve branches from the_
pharyngeal plexus supplied by the glossopharyngeal nerve and vagus nerve
79
the structure also known as the voice box, and why?
the larynx. It contains the vocal folds
80
what is the portion of the cavity above the vocal folds called
vestibule of the larynx
81
the _____, which is located in the _____, prevents food or liquids from entering the respiratory channels during swallowing
epiglottis, larynx
82
the structure also known as the adam's apple is called what? Located where?
thyroid cartilage, larynx
83
the thyroid cartilage is composed of what kind of cartilage
hyaline cartilage
84
what is the structure of hyaline cartilage that forms the inferior wall of the larynx?
cricoid cartilage
85
what are the two cartilage structures of the larynx that are involved in moving the vocal folds
arytenoid cartilages
86
what are the two cartilage structures of the larynx that are located at the apex of each arytenoid cartilage and are horn-shaped
carniculate cartilages
87
what are the two cartilage structures of the larynx that are club-shaped and located anterior to the corniculate cartilages
cuneiform cartilages
88
what can be seen on the inner lining of most of the larynx
ciliated mucous membrane. Cilia move dust-laden mucous upward toward the pharynx
89
what nerves innervate the larynx
vagus nerve
90
what is the difference between hypertrophy, hyperplasia, dysplasia, and metaplasia
hypertrophy: increase in size (often seen in athletes)
hyperplasia: increase in # of cells
dysplasia & metaplasia: a change in cell type. Can be cancerous. BAD!
91
where does the trachea expand from
the larynx to T5, where it divides into right and left primary bronchi
92
the inner lining of the trachea contains_
ciliated mucosa, which move dust-laden mucous upward toward the pharynx
93
what are the layers of the tracheal wall from deep to superficial
mucosa, submucosa, media (middle tunic), adventitia
94
what is meant by "incomplete" rings of the trachea
the open sides of the rings face the esophagus and permit slight expansion of the esophagus into the trachea during swallowing in addition to providing support to prevent collapse
95
the trachea is innervated by what nerves
the vagus nerves
96
what procedures are done to reestablish airflow past a treacheal obstruction
tracheotomy and intubation
97
where is the bronchi located
at the superior border of T5, the trachea divides into the right primary bronchus, which enters the right lung, and the left primary bronchus, which enters the left lung
98
structurally, what is the difference btw the right and left bronchus
the right primary bronchus is more vertical, shorter, and wider than the left one.
99
what is the internal ridge located at the point where the trachea divides into the right and left primary bronchi
carina
100
after entering the lungs, the primary bronchi divide into_
secondary (lobar) bronchi. (3 in the right lung, 2 in the left lung)
101
the secondary bronchi branch into_
tertiary (segmental) bronchi, which in turn divide into bronchioles
102
the bronchioles branch into progressively smaller and smaller bronchioles, and eventually turn into _
terminal bronchioles
103
bronchial tree
the continuous branching from the trachea to small bronchioles
104
what are 4 changes that can be observed as branching progresses in the bronchial tree
1. the epithelium changes from ciliated to non ciliated
2. the amount of cartilage decreases and then is eventually lost
3. smooth muscle tissue increases
4. mucosa thins
105
at the very end of terminal branches is where we can find_
alveoli (air sacs)
106
where do the bronchi receive their blood supply from
the right and left bronchial arteries
107
what separates the two lungs
the heart and other structures in the medinastinum
*medinastinum - the medial cavity of the thorax containing the heart, great vessels, and trachea
108
what are the lungs individually enclosed with and protected by
pleural membrane
109
what are the two layers of the pleural membrane
1. the superficial parietal pleura (which is attached to the thoracic wall)
2. the deeper visceral pleura ( which is attached to the lungs)
110
what is the space btw the pleura called and what is its purpose
it is the pleural cavity, which contains a lubricating fluid secreted by the membranes to reduce friction
111
pleurisy or pleuritis is_
pain due to friction between the two layers of the pleural membrane
112
what is the location of the lungs
the lungs extend from the diaphragm to just slightly above the clavicles and lie against the ribs anteriorly and posteriorly
113
the lung base vs. lung apex
the broad inferior portion of the lung is the base, and the narrow superior portion is the apex
114
where does the costalsurface of the lung lie against?
the ribs
115
through which structure do the bronchi, pulmonary blood vessels, lymphatic vessels, and nerves enter and exit the lung?
the hilum, on the mediastinal (medial) surface of the lung
116
where on the lung does the heart rest against
on the medial surface of the left lung, there is a concave cardiac notch
117
T/F, both lungs have an oblique fissure
T
118
T/F, the left lung has a horizontal fissure
F, the right lung has a horizontal fissure
119
what is the difference in fxn of the oblique fissure per lung
the oblique fissure in the left lung separates the superior lobe from the inferior lobe. In the right lung, the superior part of the oblique fissure separates the superior lobe from the inferior lobe, and from the middle lobe
120
which lung is thicker, broader and shorter
the right lung
121
the right primary bronchus divides into_
the superior, middle, and inferior secondary (lobar) bronchi.
122
the left primary bronchus divides into _
the superior and inferior secondary (lobar) bronchi.
123
alveolar sacs
two or more alveoli that share a common opening
124
wandering phagocytes that remove dust and other debris in the alveolar spaces are called_
alveolar macrophages (dust cells)
125
what are the four layers of the respiratory membrane
1. a layer of type 1 and type 2 alveolar cells with wandering alveolar macrophages that constitute the alveolar wall
2. an epithelial basement membrane underneath the alveolar wall
3. a capillary basement membrane that is often fused to the epithelial basement membrane
4. endothelial cells of the capillary
126
what are the three major processes of respiration
1. pulmonary ventilation: breathing, which includes inspiration and expiration of air btw the lungs and the atmosphere
2. external respiratoin: the exchange of gases btw the air spaces in the lungs and the blood in pulmonary capillaries; the blood gains O2 and loses CO2
3. internal (tissue) respiration: the exchange of gases btw the blood in systemic capillaries and the body's cells; the blood loses O2 and gains CO2
127
what is the clinical connection between alveoli and disease
emphysema
128
what is the clinical connection between pulmonary ventilation and disease
lung cancer
129
the process of moving air into the lungs is known as_____, and it occurs when_
inhalation. Occurs when air pressure within the alveoli of the lungs, alveolar pressure, is lower than the atmospheric pressure.
*therefore, air rushes down the pressure gradient from the atmosphere into the lungs and inspiration ends when the pressure difference is eliminated
130
for inhalation to occur, the lungs must _____
expand
131
what is the most important inspiratory muscle
the diaphragm
132
what nerves innervate the diaphragm
phorenic nerve, C3 C4 C5
133
the process of moving air out of the lungs is known as_____, and it occurs when_
exhalation. It occurs when air pressure in the lungs is greater than atmospheric pressure
134
normal exhalation during quiet breathing depends on what two factors
a. the recoil of elastic fibers that were stretched during inspiration
b. the inward pull of surface tension due to the film of alveolar fluid
135
in which case does air rush DOWN the pressure gradient from the alvoli into the atmosphere
exhalation
136
what kind of exhalation involves the contractions of abdominal and internal intercostal muscles
FORCED exhalation
137
the area from which nerve impulses are sent to respiratory muscles consists of cluster of neurons located _____ in the _____ _____ and _____
Bilaterally
medulla oblongata
pons
138
the respiratory center consists of a dispersed group of neurons that are functionally divided into what three areas
1. the medullary rhythmicity area: located in medulla oblongata, controls basic rhythm of respiration, sends nerve impulses via phrenic nerves to the diaphragm to cause typical breathing cycle
2. pneumotaxic area: located in the superior portion of the pons, coordinates transition btw inspiration & expiration, transmits inhibitory impulses to limit duration of inspiration
3.apneustic area: located in the superior portion of the pons, coordinates transition btw inspiration & expiration, stimulates inspiratory area to prolong inspiration and therefore inhibit expiration; each stimulation occurs only when pneumotaxic area is inactive
139
normal resting state is aprox:
2 sec inhale, 3 sec exhale
140
when pneumotaxic area is more active, breathing rate is more _
rapid
141
the respiratory center is located in
the brain stem
142
how is it that we can voluntarily alter our pattern of breathing
(cortical influences) - the cerebral cortex has connections with the respiratory center
143
what does voluntary control of breathing allows us to
prevent water or irritating gases from entering the lungs
144
what are the functions of chemoreceptors
they monitor levels of CO2, H+, & O2, and provide input to the respiratory center.
Central chemoreceptors are located in the medulla oblongata
peripheral chemoreceptors are located in the aortic bodies and carotid bodies
145
what is the inflation (hering-breuer) reflex
a protective reflex intitiated by lung baroreceptors or stretch receptors to prevent overinflation of the lungs
146
which of the following laryngeal carilages is/are not paired?
A. epiglottis
b. arytenoid
c. cricoid
d. cuneiform
e. corniculate
a. epiglottis, c. cricoid
147
under ordinary circumstances, the inflation reflex is initiated by
overinflation of the alveoli and bronchioles
148
in mouth to mouth artificial respiration, the rescuer blows air from his or her own respiratory system into that of the victim. what happens?
A.expansion of the victim's lungs is brought about by blowing air in at higher than atmospheric pressure
b. during inflation of the lungs, the intrapleural pressure increases
c. this tecnique will not work if the victim has a hole in the chest wall, even if the lungs are intact
d.expiration during this procedure depends on the elasticity of the alveolar and thoracic walls
e. all of these
b. during inflation of the lungs, the intrapleural pressure increases
149
movement of air into and out of the lungs so that gases are continuously changed and refreshed
pulmonary ventilation
150
transport of oxygen from lungs to body cells and carbon dioxide from tissue cells to lungs
transport of respiratory gases
151
movement of oxygen from the blood to tissue cells, and of carbon dioxide from tissue cells to blood
internal respiration
152
movement of oxygen from the lungs to the blood, and of carbon dioxide from the blood to the lungs
external respiration
153
the actual site of gas exchange in the lungs
respiratory zone
154
the fairly rigid conduits for air to reach the gas exchange sites in the lungs
conducting zone
155
secretes mucus and antibacterial enzymes; traps dust, bacteria, and warms air during inspiration
nasal cavity
156
commonly called the throat; air leaves the nose and enters here en route to the lungs
pharynx
157
contains vocal cords that produce speech; called the voice box
larynx
158
descends from the larynx as a single tube reinforced with cartilage rings before it divides to go to each lung
trachea
159
major branches of the cartilage-reinforced tube that go to each lung
bronchi
160
terminal pockets of the lungs where respiratory gas exchange occurs
alveoli
161
single tube with C rings of cartilage
trachea
162
paired tubes with rings of cartilage
primary bronchi
163
three in the right lung; two in the left; plates of cartilage
secondary bronchi
164
about ten in each lung, small amounts of cartilage; smooth muscle dominates
tertiary bronchi
165
many small tubes of less than 1 mm in diameter; smooth muscle only in the walls; no cartilage
bronchioles
166
air moves into the lungs because
the gas pressure in the lungs becomes lower than the outside pressure as the diaphragm contracts
167
the movement of air into and out of the alveoli during a particular time is known as
alveolar ventilation
168
the movement of air into and out of the lungs is known as
pulmonary ventilation
169
the tissue that lines the trachea:
pseudostratified columnar epithelium
170
the _____ controls the respiratory rate
medulla
171
_____ pressure keeps the air spaces in the lung open
transpulmonary
172
the gas exchange between the blood and the alveoli
external respiration
