BIO 253 EXAM 3
HONDROSQUESTIONS AND VERIFIED
CORRECT ANSWERS LATEST
UPDATE 2025-2026 ALREADY
GRADED
The mechanism that produces pulmonary ventilation is one that establishes a gas
pressure gradient between the - ANSWERatmosphere and the alveolar air. Correct
Pressure gradients are established by changes in the - ANSWERthoracic cavity.
Correct
_____ law states that the volume of a gas is inversely proportional to its pressure. -
ANSWERBoyle's
During inspiration, as the size of the thorax increases, the - ANSWERintrapleural and
alveolar pressures decrease. Correct
The ability of the lungs and thorax to stretch is referred to as - ANSWERcompliance.
Correct
An obstructive lung disorder that is characterized by recurring spasms of the smooth
muscles in the wall of the bronchial air passages is - ANSWERasthma. Correct
During the respiratory cycle, intrapleural pressure is always less than alveolar pressure.
This difference is called - ANSWERtranspulmonary pressure. Correct
The sensors that provide feedback information to the medullary rhythmicity area are the
- ANSWERcentral chemoreceptors and peripheral chemoreceptors. Correct
The apparatus used to measure the volume of air exchanged in breathing is called a(n)
- ANSWERspirometer. Correct
The basic rhythm of the respiratory cycle of inspiration and expiration seems to be
generated by the - ANSWERmedullary rhythmicity area. Correct
Which term refers to the volume of inspired air that actually reaches, or "ventilates," the
alveoli? - ANSWERalveolar ventilation Correct
, The volume of air exhaled normally after a typical inspiration is called _____ volume. -
ANSWERtidal Correct
Hyperpnea means a(n) - ANSWERincrease in breathing. Correct
The _____ represents the largest volume of air an individual can move in and out of the
lungs. - ANSWERvital capacity Correct
The forced expiratory volume test can determine the presence of respiratory obstruction
by measuring the - ANSWERvolume of air expired per second during forced expiration.
Correct
According to the law of partial pressures, the partial pressure of gas in a mixture of
gases is - ANSWERdirectly related to the concentration of that gas in the mixture and to
the total pressure of the mixture. Correct
Oxygen enters blood from alveolar air because the partial pressure of alveolar air is -
ANSWERgreater than the partial pressure of incoming blood. Correct
The amount of oxygen that diffuses into blood each minute depends on which factor? -
ANSWERoxygen pressure gradient between alveolar air and incoming pulmonary blood
total functional surface area of the respiratory membrane
respiratory minute volume
alveolar ventilation
Which structural feature facilitates oxygen diffusion from the alveolar air into the blood in
lung capillaries? - ANSWERThe alveolar and capillary walls are both very thin.
The alveolar and capillary surfaces are both extremely large.
The lung capillaries accommodate a large amount of blood at one time.
Each red blood cell comes close to alveolar air.
The exact amount of oxygen in blood depends mainly on the amount of -
ANSWERhemoglobin
In what form does oxygen travel in the blood? - ANSWERdissolved oxygen in the
plasma
associated with hemoglobin
The compound formed when carbon dioxide combines with hemoglobin is -
ANSWERcarbaminohemoglobin. Correct
When carbon dioxide dissolves in water, some of the carbon dioxide molecules
associate with water to form - ANSWERcarbonic acid. Correct
HONDROSQUESTIONS AND VERIFIED
CORRECT ANSWERS LATEST
UPDATE 2025-2026 ALREADY
GRADED
The mechanism that produces pulmonary ventilation is one that establishes a gas
pressure gradient between the - ANSWERatmosphere and the alveolar air. Correct
Pressure gradients are established by changes in the - ANSWERthoracic cavity.
Correct
_____ law states that the volume of a gas is inversely proportional to its pressure. -
ANSWERBoyle's
During inspiration, as the size of the thorax increases, the - ANSWERintrapleural and
alveolar pressures decrease. Correct
The ability of the lungs and thorax to stretch is referred to as - ANSWERcompliance.
Correct
An obstructive lung disorder that is characterized by recurring spasms of the smooth
muscles in the wall of the bronchial air passages is - ANSWERasthma. Correct
During the respiratory cycle, intrapleural pressure is always less than alveolar pressure.
This difference is called - ANSWERtranspulmonary pressure. Correct
The sensors that provide feedback information to the medullary rhythmicity area are the
- ANSWERcentral chemoreceptors and peripheral chemoreceptors. Correct
The apparatus used to measure the volume of air exchanged in breathing is called a(n)
- ANSWERspirometer. Correct
The basic rhythm of the respiratory cycle of inspiration and expiration seems to be
generated by the - ANSWERmedullary rhythmicity area. Correct
Which term refers to the volume of inspired air that actually reaches, or "ventilates," the
alveoli? - ANSWERalveolar ventilation Correct
, The volume of air exhaled normally after a typical inspiration is called _____ volume. -
ANSWERtidal Correct
Hyperpnea means a(n) - ANSWERincrease in breathing. Correct
The _____ represents the largest volume of air an individual can move in and out of the
lungs. - ANSWERvital capacity Correct
The forced expiratory volume test can determine the presence of respiratory obstruction
by measuring the - ANSWERvolume of air expired per second during forced expiration.
Correct
According to the law of partial pressures, the partial pressure of gas in a mixture of
gases is - ANSWERdirectly related to the concentration of that gas in the mixture and to
the total pressure of the mixture. Correct
Oxygen enters blood from alveolar air because the partial pressure of alveolar air is -
ANSWERgreater than the partial pressure of incoming blood. Correct
The amount of oxygen that diffuses into blood each minute depends on which factor? -
ANSWERoxygen pressure gradient between alveolar air and incoming pulmonary blood
total functional surface area of the respiratory membrane
respiratory minute volume
alveolar ventilation
Which structural feature facilitates oxygen diffusion from the alveolar air into the blood in
lung capillaries? - ANSWERThe alveolar and capillary walls are both very thin.
The alveolar and capillary surfaces are both extremely large.
The lung capillaries accommodate a large amount of blood at one time.
Each red blood cell comes close to alveolar air.
The exact amount of oxygen in blood depends mainly on the amount of -
ANSWERhemoglobin
In what form does oxygen travel in the blood? - ANSWERdissolved oxygen in the
plasma
associated with hemoglobin
The compound formed when carbon dioxide combines with hemoglobin is -
ANSWERcarbaminohemoglobin. Correct
When carbon dioxide dissolves in water, some of the carbon dioxide molecules
associate with water to form - ANSWERcarbonic acid. Correct
