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50 Cards in this Set

  • Front
  • Back
Oxygen and carbon dioxide are transported between the cells of the body and the respiratory system by the _________.
circulatory system
The smallest branches of the repiratory system tubes terminate in clusters of microscopic air sacs called _____________.
Gas exchange takes place between the blood and the atmosphere in structures called ____________.
Blood enters the lung from the heart through a major artery known as the ____________.
pulmonary artery
The mouth and nasal cavities meet in a region known as the ____________.
The nasal cavities open to the external environment at the nostrils, also called the _________________.
external nares
Passageways in the nasal cavity are separated from one another by bony extensions of the nasal septum known as the _____________.
nasal conchae
Many bones of the skull contain openings from the nasal cavities referred to as ________________.
At the roof of the nasal cavities the sense of smell is associated with an area called the ________________.
olfactory region
Three functions of the nose include moistening the air, filtering the air, and ___________________.
warming the air
Allergic reactions occurring within the nasal chambers are given the general name ___________________.
allergic rhinitis
Another name for the pharynx is the ______________.
The digestive and respiratory passageways meet one another at a region of the pharynx referred to as the ________________.
The lateral walls of the nasopharynx contain openings of tubes from the middle ear known as ____________.
Eustachian tubes
The mass of lymphatic tissue on the medial posterior wall of the nasopharynx is the _________________.
pharyngeal tonsils
The largest cartilage of the larynx, also known as the Adam's apple, is the ______________.
thyroid cartilage
The cartilage of the larynx that resembles a signet ring and connects the trachea and larynx is the _____________.
cricoid cartilage
The opening to the larynx is referred to as the __________.
Vibrations of the vocal chords are due to air exhaled from the _________________.
Because men have longer vocal chords, their voices have lower ____________.
The trachea is supported by a series of C-shaped rings of ________________.
The two primary tubes that branch from the trachea are the _______________.
There is no cartilage in the tubes when the bronchi become ________________.
Bronchioles are composed entirely of muscle referred to as ________________.
smooth muscle
The common name for inflammation of the bronchial tree is ______________.
The lungs occupy most of the space of the _____________.
thoracic cavity
The number of alveoli in the average adult numbers approximately ____________.
300 million
The left lung is subdivided into two lobes, while the right lung is subdivided into __________.
three lobes
The two-layer membrane surrounding each lung is the _______________.
The outer layer of pleura lining the inner surface of the thoracic cavity is the __________________.
parietal pleura
The underlying principle of breathing is that air flows from the region of high pressure to a region of ____________.
low pressure
Pressure changes occurring in the lungs can be traced to the activity of skeletal muscles known as __________.
respiratory muscles
During inspiration, the ribs are raised upward and outward by a set of repiratory muscles called _____________.
external intercostal muscles
During inspiration, contractions cause the downward movement of a dome-shaped muscle known as the _____________.
The relaxation of repiratory muscles compresses the thorax and increases the air pressure in the ___________.
While inspiration is an active process, the process of expiration is a(n) __________.
passive process
The amount of air that enters and leaves the lungs in a normal breath under resting conditions is the _________.
resting tidal volume
The volume of air that can be forced out of the lungs after a forced inspiration is the _______________.
vital capacity
Breathing is controlled by an area of the brain called the repiratory control center, which includes part of the medulla oblongata and the ______________.
The repiratory centers in the brain are regulated indirectly by the bloodstream's level of __________________.
carbon dioxide
The rate of breathing is controlled by an area of the brain known as the ______________.
pneumotaxic area
The respiratory center is activated by the cerebrospinal fluid level of ______________.
hydrogen ions
While the contraction of skeletal muscles is usually voluntary, the control of breathing is usually _______________.
The great majority of oxygen is carried in the body in association with __________.
hemoglobin molecules
Approximately 70-75 percent of carbon dioxide is transported in the blood in the form of _________.
bicarbonate ions/sodium bicarbonate
Aproximately 25-30 percent of the carbon dioxide in the body is carried as ____________.
carboxyhemoglobin molecules
The driving force behind the exchange of gases in the alveoli is the process of __________________.
While active transport is an active process for the movement of molecules, diffusion is a(n) _________.
passive process
During lung gas exchange, oxygen molecules move toward the ______________.
red blood cells
During lung gas exchange, carbon dioxide molecules move toward the ___________.
alveolar sac