A&P 1 101 MODULE 3 EXAM 3 DIGESTIVE
SYSTEM FINAL PAPER 2026 TESTED
QUESTIONS WITH FULL SOLUTION GRADED
A+
◉ The statement, "in a mixture of gases, the total pressure is the
sum of the individual partial pressures of gases in the mixture"
paraphrases ________. Answer: Dalton's law
◉ During normal quiet breathing, approximately 750 ml of air
moves into and out of the lungs with each breath. Answer: False
◉ The nose serves all the following functions except _________.
Answer: as the initiator of the cough reflex
◉ Where the respiratory zone of the lungs begins. Answer:
Respiratory bronchioles
◉ No exchange of gases occurs here. Answer: Nasal Cavity
◉ Composed of simple squamous epithelium. Answer: Type 1 cells
,◉ Unlike inspiration, expiration is a passive act because no muscular
contractions are involved. Expiration, however, depends on two
factors. Which of the choices below lists those two factors? Answer:
the recoil of elastic fibers that were stretched during inspiration and
the inward pull of surface tension due to the film of alveolar fluid
◉ Which of the choices below is not a functional process of
respiration? Answer: transport in the thoracic duct
◉ Intrapulmonary pressure is the ________. Answer: pressure within
the alveoli of the lungs
◉ The walls of the alveoli are composed of two types of cells, type I
and type II. The function of type II is to ________. Answer: secrete
surfactant
◉ Which of the following maintains the patency (openness) of the
trachea? Answer: cartilage rings
◉ Complete the following statement using the choices below. Air
moves out of the lungs when the pressure inside the lungs is
Answer: greater than the pressure in the atmosphere.
◉ Secrete a fluid containing surfactant. Answer: Type II cells
,◉ Terminates in alveoli. Answer: Alveolar duct
◉ The most powerful respiratory stimulus for breathing in a healthy
person is ________. Answer: increase of carbon dioxide
◉ The erythrocyte count increases after a while when an individual
goes from a low to a high altitude because of the ________. Answer:
concentration of oxygen and/or total atmospheric pressure is lower
at high altitudes
◉ Dalton's law states that the total pressure exerted by a mixture of
gases is the sum of the pressures exerted independently by each gas
in the mixture. Answer: True
◉ Oxygenated hemoglobin releases oxygen more readily when the
pH is more basic Answer: False
◉ For gas exchange to be efficient, the respiratory membrane must
be ________. Answer: 0.5 to 1 micrometer thick
◉ Surfactant helps to prevent the alveoli from collapsing by ________.
Answer: interfering with the cohesiveness of water molecules,
thereby reducing the surface tension of alveolar fluid
, ◉ Which of the choices below determines the direction of
respiratory gas movement? Answer: partial pressure gradient
◉ Which of the choices below describes the forces that act to pull
the lungs away from the thoracic wall and thus collapse the lungs?
Answer: the natural tendency for the lungs to recoil and the surface
tension of the alveolar fluid
◉ Tidal volume is air ________. Answer: exchanged during normal
breathing
◉ The average individual has 500 ml of residual volume in his lungs.
Answer: False
◉ Which of the following is not an event necessary to supply the
body with O2 and dispose of CO2? Answer: blood pH adjustment
◉ The factors responsible for holding the lungs to the thoracic wall
are _______. Answer: surface tension from pleural fluid and negative
pressure in the pleural cavity
◉ Possible causes of hypoxia include ________. Answer: too little
oxygen in the atmosphere
SYSTEM FINAL PAPER 2026 TESTED
QUESTIONS WITH FULL SOLUTION GRADED
A+
◉ The statement, "in a mixture of gases, the total pressure is the
sum of the individual partial pressures of gases in the mixture"
paraphrases ________. Answer: Dalton's law
◉ During normal quiet breathing, approximately 750 ml of air
moves into and out of the lungs with each breath. Answer: False
◉ The nose serves all the following functions except _________.
Answer: as the initiator of the cough reflex
◉ Where the respiratory zone of the lungs begins. Answer:
Respiratory bronchioles
◉ No exchange of gases occurs here. Answer: Nasal Cavity
◉ Composed of simple squamous epithelium. Answer: Type 1 cells
,◉ Unlike inspiration, expiration is a passive act because no muscular
contractions are involved. Expiration, however, depends on two
factors. Which of the choices below lists those two factors? Answer:
the recoil of elastic fibers that were stretched during inspiration and
the inward pull of surface tension due to the film of alveolar fluid
◉ Which of the choices below is not a functional process of
respiration? Answer: transport in the thoracic duct
◉ Intrapulmonary pressure is the ________. Answer: pressure within
the alveoli of the lungs
◉ The walls of the alveoli are composed of two types of cells, type I
and type II. The function of type II is to ________. Answer: secrete
surfactant
◉ Which of the following maintains the patency (openness) of the
trachea? Answer: cartilage rings
◉ Complete the following statement using the choices below. Air
moves out of the lungs when the pressure inside the lungs is
Answer: greater than the pressure in the atmosphere.
◉ Secrete a fluid containing surfactant. Answer: Type II cells
,◉ Terminates in alveoli. Answer: Alveolar duct
◉ The most powerful respiratory stimulus for breathing in a healthy
person is ________. Answer: increase of carbon dioxide
◉ The erythrocyte count increases after a while when an individual
goes from a low to a high altitude because of the ________. Answer:
concentration of oxygen and/or total atmospheric pressure is lower
at high altitudes
◉ Dalton's law states that the total pressure exerted by a mixture of
gases is the sum of the pressures exerted independently by each gas
in the mixture. Answer: True
◉ Oxygenated hemoglobin releases oxygen more readily when the
pH is more basic Answer: False
◉ For gas exchange to be efficient, the respiratory membrane must
be ________. Answer: 0.5 to 1 micrometer thick
◉ Surfactant helps to prevent the alveoli from collapsing by ________.
Answer: interfering with the cohesiveness of water molecules,
thereby reducing the surface tension of alveolar fluid
, ◉ Which of the choices below determines the direction of
respiratory gas movement? Answer: partial pressure gradient
◉ Which of the choices below describes the forces that act to pull
the lungs away from the thoracic wall and thus collapse the lungs?
Answer: the natural tendency for the lungs to recoil and the surface
tension of the alveolar fluid
◉ Tidal volume is air ________. Answer: exchanged during normal
breathing
◉ The average individual has 500 ml of residual volume in his lungs.
Answer: False
◉ Which of the following is not an event necessary to supply the
body with O2 and dispose of CO2? Answer: blood pH adjustment
◉ The factors responsible for holding the lungs to the thoracic wall
are _______. Answer: surface tension from pleural fluid and negative
pressure in the pleural cavity
◉ Possible causes of hypoxia include ________. Answer: too little
oxygen in the atmosphere
