The nasal cavity is indicated by ________. |
label a |
The right main (primary) bronchus is indicated by ________. |
label h |
The trachea is indicated by ________. |
label i |
The diaphragm muscle is indicated by ________. |
label g |
The oral cavity is indicated by ________. |
label c |
The inferior lobe of the right lung is indicated by ________. |
label f |
The nostrils, or nares, are indicated by ________. |
label b |
The apex of the right lung is indicated by ________. |
label e |
The larynx is indicated by ________. |
label d |
The pharynx is indicated by ________. |
label j |
The three mucosa-covered projections into the nasal cavity that greatly increase surface area of mucosa exposed to air are called ________. |
conchae |
The posterior portion of the palate that is not supported by bone is called the ________. |
soft palate |
From superior to inferior, the three regions of the pharynx are the ________. |
nasopharynx, oropharynx, laryngopharynx |
The ________ tonsil, or adenoid, is located high in the nasopharynx region. |
pharyngeal |
The ________ routes air and food into their proper channels and plays a role in speech. |
larynx |
The mucosa-lined windpipe that extends from the larynx to the level of the fifth thoracic vertebra is called the ________. |
trachea |
________ lining the mucosa of the trachea beat continuously to propel contaminated mucus to the throat. |
cilia |
When breathing in, air enters the trachea through the ________. |
glottis |
The C-shaped rings that reinforce the trachea are constructed of ________. |
hyaline cartilage |
The flap of ________ cartilage that protects the opening of the larynx is called the epiglottis. |
elastic |
Folds of mucous membrane called ________ vibrate to provide speech. |
vocal folds (true vocal cords) |
The serous membrane that surrounds each lung is created by a parietal and visceral ________. |
pleura |
The division of the trachea produces two tubes called the right and left main (primary) ________. |
bronchi |
The smallest conducting passageways of the lungs are known as ________. |
bronchioles |
The ________ zone includes the respiratory bronchioles, alveolar ducts, alveolar sacs, and alveoli and is where gas exchange occurs. |
respiratory |
The process of moving air into and out of the lungs is commonly called breathing or ________. |
pulmonary ventilation |
Gas exchange between the pulmonary blood and alveoli is called ________. |
external respiration |
The inspiratory muscles that contract so we can inspire air are the ________ and ________. |
diaphragm; external intercostals |
Air flowing out of the lungs is known as ________. |
expiration |
Lung collapse, or ________, can occur if the intrapleural pressure equals atmospheric pressure when air enters the pleural space. |
atelectasis |
________ volume is the air moved into and out of the lungs during normal quiet breathing and is approximately 500 mL of air. |
tidal |
The total amount of exchangeable air is known as ________. |
vital capacity (VC) |
Respiratory capacities are measured with a ________. |
spirometer |
During ________, oxygen binds to hemoglobin to form oxyhemoglobin. |
external respiration |
________ is an odorless, colorless gas which binds preferentially with the same binding site on hemoglobin as oxygen. |
Carbon monoxide |
When carbon dioxide dissolves in water, it forms ________. |
carbonic acid |
The normal respiratory rate of 12-15 breaths per minute is known as ________. |
eupnea |
The portions of the brain that contain respiratory centers and set the breathing rate are the ________. |
medulla and pons |
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. |
phrenic; intercostal |
The most important stimulus for breathing in a healthy person is the body’s need to rid itself of the blood gas called ________. |
carbon dioxide |
In order to return acidic blood pH to normal, breathing becomes deeper and more rapid, a phenomenon known as ________. |
hyperventilation |
________ is a fatty molecule made by alveolar cells to reduce surface tension and prevent alveolar collapse between breaths. |
Surfactant |
Gas exchange occurs in the ________. |
alveoli |
The respiratory conducting passageways perform all of the following functions EXCEPT ________. |
exchange gases |
What sweeps contaminated mucus from the nasal cavity to the throat? |
cilia |
What is the role of mucus in the nasal cavity? |
trap incoming bacteria and other foreign debris |
The nasal cavity is separated from the oral cavity by ________. |
both the hard and soft palate |
Which one of the following bones does NOT contain paranasal sinuses? |
mandible |
Which tonsil(s) is/are located in the oropharynx at the end of the soft palate? |
palatine tonsils |
Air from the nasal cavity enters the superior portion of the pharynx called the ________. |
nasopharynx |
The pharynogotympanic tubes, which drain the middle ear, open into the ________. |
nasopharynx |
The correct pathway air flows through the respiratory system is ________. |
nose, pharynx, larynx, trachea, main (primary) bronchi |
Following the removal of the larynx, a person would be unable to ________. |
speak |
The opening between the vocal cords is called the ________. |
glottis |
The flap of elastic cartilage that protects food from entering the larynx when swallowing is the ________. |
epiglottis |
Vibration due to exhaled air that results in speech is a function of the ________. |
true vocal cords |
The superior portion of each lung is the ________. |
apex |
The serous membrane covering the surface of the lungs is called the ________. |
visceral pleura |
Which one of the following is NOT true of the lungs? |
both lungs have two lobes |
What is the function of an alveolar macrophage? |
engulf bacteria, carbon particles, and debris |
Which one of the following structures is NOT part of the respiratory zone? |
primary bronchi |
Which of the following is NOT one of the four main events of respiration? |
residual volume |
Exchange of both oxygen and carbon dioxide through the respiratory membrane occurs by ________. |
simple diffusion |
The lipid molecule critical to lung function that coats the gas-exposed alveolar surfaces is called ________. |
surfactant |
Air moving in and out of the lungs during normal quiet breathing is called ________. |
pulmonary ventilation |
Which one of the following is NOT true of inspiration? |
relaxation of the external intercostal muscles helps increase the size of the thoracic cavity |
The gas exchange that occurs between blood and tissue cells at systemic capillaries is called ________. |
internal respiration |
Expiration (exhalation) occurs when ________. |
the diaphragm and intercostal muscles relax |
Which nonrespiratory air movement clears the upper respiratory passageways? |
sneezing |
Laura’s lung collapsed during a skiing accident when a rib punctured her lung. The condition of a collapsed lung is known as ________. |
atelectasis |
The respiratory movement representing the total amount of exchangeable air is the ________. |
vital capacity |
Even after a forceful expiration, air still remains in the lungs for gas exchange to continue. This volume is about ________. |
1200 mL |
The amount of air exchanged during normal quiet breathing is about ________. |
500 mL |
Most carbon dioxide dissolves in blood plasma for transport as ________. |
bicarbonate ion |
Oxygen is unloaded from the blood stream and diffuses into surrounding cells and tissues during ________. |
internal respiration |
Oxygen is transported in the blood as ________. |
oxyhemoglobin |
Which of the following breathing rates represents eupnea? |
14 breaths per minute |
Hyperventilation is the body’s response to ________. |
increased carbon dioxide levels in the blood |
Hypoventilation dramatically increases carbonic acid concentration and involves ________. |
extremely slow breathing |
Hyperventilation leads to all of the following except ________. |
buildup of carbon dioxide in the blood |
The most important chemical stimulus leading to increased rate and depth of breathing is ________. |
increased carbon dioxide in the blood |
Which one of the following is NOT a feature of chronic obstructive pulmonary disease (COPD)? |
most patients have a genetic predisposition to COPD |
Which respiratory disease in which sufferers are often called "pink puffers," is characterized by enlarged alveoli, lung inflammation, and fibrosis of the lungs? |
emphysema |
What accounts for the majority of cases of lung cancer? |
adenocarcinoma |
Surfactant is usually present in fetal lungs in adequate quantities by ________. |
28-30 weeks of pregnancy |
The abbreviation IRDS stands for ________. |
infant respiratory distress syndrome |
What is the most common cause for lung cancer? |
smoking |
The respiratory rate in infants is ________. |
over 40 respirations per minute |
The homeostatic imbalance associated with the death of many full-term newborn infants is called ________. |
SIDS |
Chronically inflamed, hypersensitive bronchial passages that respond to many irritants are characteristic of ________. |
asthma |
Which of these age-related disorders is related to loss of elasticity of the lungs? |
sleep apnea |
Which one of the following is NOT true of lung cancer? |
it is generally more prevalent in males than females |
Passageway for both food and air; known as the "throat" |
pharynx |
Rigid, patent airway reinforced with C-rings of hyaline cartilage |
trachea |
Routes air and food into their proper channels |
larynx |
Protects the superior opening of the larynx during swallowing |
epiglottis |
Opening to the trachea situated between the vocal cords |
glottis |
First tube to branch off of the trachea |
main (primary) bronchus |
Smallest conducting passageways in the lungs |
bronchioles |
Part of the respiratory zone, these air sacs perform gas exchange |
alveoli |
Breathing in and out while at rest |
pulmonary ventilation |
Gas exchange occurring between the pulmonary blood and alveoli |
external respiration |
Gas exchange occurring between systemic capillaries and surrounding cells and tissues |
internal respiration |
Inspiration and expiration |
pulmonary ventilation |
Oxygen loading and carbon dioxide unloading |
external respiration |
Movement of carbon dioxide and oxygen through the blood |
respiratory gas transport |
Amount of air that can be forcibly exhaled after a normal tidal expiration |
expiratory reserve volume |
Normal, quiet breathing which moves approximately 500 mL of air per breath |
tidal volume |
Air that enters the respiratory tract and remains within the conducting zone passageways |
dead space volume |
Amount of air that can be inhaled forcibly over the tidal volume |
inspiratory reserve volume |
Total amount of exchangeable air |
vital capacity |
Air that remains in the lungs even after the most strenuous expiration |
residual volume |
Sum total of tidal volume, inspiratory reserve volume, and expiratory reserve volume |
vital capacity |
By which of these are tiny dust particles removed from alveolar surfaces? |
macrophages |
What part of the respiratory passageway primarily functions to warm, humidify, and filter inhaled air? |
nasal cavity |
Where are the alveoli found? |
in the lungs |
Which of the following is NOT a physical factor that influences the respiratory rate? |
amount of O2 and CO2 in the blood |
By what process does oxygen move from the alveoli into the blood of the pulmonary capillaries? |
simple diffusion |
How is most carbon dioxide transported from body cells to the lungs? |
as bicarbonate ion |
What is the main stimulus for increasing pulmonary ventilation during aerobic exercise? |
increased concentration of carbon dioxide in blood |
What part of the brain stimulates the phrenic and intercostal nerves causing the diaphragm and external intercostal muscles to contract? |
medulla oblongata |
What is the pressure in the lungs during inspiration? |
lower than atmospheric air pressure |
Which disorder involves inflammation and excess mucus secretion in the lower respiratory passages? |
chronic bronchitis |
Which of the following statements describe the normal changes that occur in respiratory system functioning from infancy to old age? |
-Premature infants have problems keeping their lungs inflated because of lack of surfactant in their alveoli. -Many old people tend to become hypoxic during sleep and exhibit sleep apnea. |
Under what circumstances might a person have a cleft palate? |
if there is a family history of cleft palate |
What term is used for the movement of oxygen into the blood of pulmonary capillaries and carbon dioxide into the alveolar air? |
external respiration |
Why does vital capacity decrease in old age? |
The chest wall becomes more rigid and the lungs lose their elasticity. |
Which of these will cause the buildup of CO2 that decreases blood pH? |
apnea |
Which of the following is a practice that has led to a sharp decline in sudden infant death syndrome (SIDS)? |
placing infants on their backs to sleep |
The Respiratory System
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