PATHOPHYSIOLOGY GAS EXCHANGE WEEK
7 EXAM QUESTIONS LATEST UPDATED 2025
WITH VERIFIED ACTUAL ANSWERS
in the alveoli, but does not occur in the trachea, bronchioles, or diaphragm - answer ✔✔-Gas exchange
occurs
gases travel between the alveoli and the capillaries by moving from areas of high concentration and
pressure to an area of low concentration and pressure. This is because of the principles of diffusion and
changes in pressure during exhalation and inhalation. The pressure and concentration gradient are
always changing but, generally, the force produced at higher pressures can move the gases in certain
directions. - answer ✔✔-Based on fluid dynamics and physics,
is the transportation of oxygen (O2) into the blood and cells and carbon dioxide (CO2) from the blood
and cells. For gas exchange to occur at the cellular level, ventilation, or the movement of O2 into and
CO2 out of the lungs, must occur. The respiratory system works in synchrony to ensure that inhaled air
spends enough time within the alveoli of the lung for this gas exchange to occur. Gas exchange is a
complex system of timing and chemistry that guarantees the body the gases it needs to survive. -
answer ✔✔-Gas exchange
is how oxygen moves from the air that we breathe to the cells as carbon dioxide moves from the cells
into the air we breathe. - answer ✔✔-Gas exchange
for cellular metabolism. Hemoglobin transports oxygen. Oxygen is exchanged for carbon dioxide in the
alveoli of the lung. Each hemoglobin molecule is limited by the amount of oxygen it carries. - answer
✔✔-Oxygen is vital
Transfer of gases between environments
Lungs and cells of the body are two common places for exchange
Gas exchange happens in the kidneys and cells through cellular respiration
, Gases need transport to site of exchange
For gas to be exchanged, it needs transportation. Imagine a car, moving people from one place to
another. When the car gets to the destination, it picks up other people and returns them home.
Just like a car, hemoglobin transports carbon dioxide (waste from cells) to the alveoli and exchanges it
for oxygen that has been inhaled.
When a person inhales, oxygen is sucked into the lungs.
After the exchange, hemoglobin (part of a red blood cell) takes oxygen to the cells.
Gas exchange can occur in all types of different body systems. One example of gas exchange is what
occurs between the red blood cell and the alveoli in the lungs through a process of pressure and
diffusion. Not matter where it occurs, the p - answer ✔✔-Gas Exchange Definitions:
not enough oxygen in the environment (suffocation)
too much carbon dioxide in the environment (carbon dioxide poisoning)
partial or full blockage between the mouth and the alveoli (choking)
blockage of gas exchange by another substance or chemical (drowning, infection)
not enough hemoglobin to carry oxygen (anemia)
blood clots in the capillaries or veins (pulmonary emboli)
difficulty exhaling because of trapped air (asthma or chronic obstructive pulmonary disease)
muscles used to breathe are too weak (spinal cord injury, myasthenia gravis)
A clot in the left leg produces an embolus (a free-floating blood clot) that travels through the venous
system to the inferior vena cava. The embolus passes through the right side of the heart, through the
pulmonary artery, and lodges in a smaller vein within the lungs blocking the flow of blood. - answer ✔✔-
Many different things can impact gas exchange. Here are just a few to consider:
There is not enough oxygen being collected (ventilation) or something is preventing the oxygen from
getting to its destination (perfusion). Click on each tab below to see some reasons for each. - answer
✔✔-When something does go wrong, there are two main reasons this happens.
limited or no oxygen in the environment (limited oxygen in surrounding environment)
not enough pressure to pull the oxygen into the lungs (muscle weakness)
something is blocking the airway (foreign object or tongue) - answer ✔✔-ventilation
7 EXAM QUESTIONS LATEST UPDATED 2025
WITH VERIFIED ACTUAL ANSWERS
in the alveoli, but does not occur in the trachea, bronchioles, or diaphragm - answer ✔✔-Gas exchange
occurs
gases travel between the alveoli and the capillaries by moving from areas of high concentration and
pressure to an area of low concentration and pressure. This is because of the principles of diffusion and
changes in pressure during exhalation and inhalation. The pressure and concentration gradient are
always changing but, generally, the force produced at higher pressures can move the gases in certain
directions. - answer ✔✔-Based on fluid dynamics and physics,
is the transportation of oxygen (O2) into the blood and cells and carbon dioxide (CO2) from the blood
and cells. For gas exchange to occur at the cellular level, ventilation, or the movement of O2 into and
CO2 out of the lungs, must occur. The respiratory system works in synchrony to ensure that inhaled air
spends enough time within the alveoli of the lung for this gas exchange to occur. Gas exchange is a
complex system of timing and chemistry that guarantees the body the gases it needs to survive. -
answer ✔✔-Gas exchange
is how oxygen moves from the air that we breathe to the cells as carbon dioxide moves from the cells
into the air we breathe. - answer ✔✔-Gas exchange
for cellular metabolism. Hemoglobin transports oxygen. Oxygen is exchanged for carbon dioxide in the
alveoli of the lung. Each hemoglobin molecule is limited by the amount of oxygen it carries. - answer
✔✔-Oxygen is vital
Transfer of gases between environments
Lungs and cells of the body are two common places for exchange
Gas exchange happens in the kidneys and cells through cellular respiration
, Gases need transport to site of exchange
For gas to be exchanged, it needs transportation. Imagine a car, moving people from one place to
another. When the car gets to the destination, it picks up other people and returns them home.
Just like a car, hemoglobin transports carbon dioxide (waste from cells) to the alveoli and exchanges it
for oxygen that has been inhaled.
When a person inhales, oxygen is sucked into the lungs.
After the exchange, hemoglobin (part of a red blood cell) takes oxygen to the cells.
Gas exchange can occur in all types of different body systems. One example of gas exchange is what
occurs between the red blood cell and the alveoli in the lungs through a process of pressure and
diffusion. Not matter where it occurs, the p - answer ✔✔-Gas Exchange Definitions:
not enough oxygen in the environment (suffocation)
too much carbon dioxide in the environment (carbon dioxide poisoning)
partial or full blockage between the mouth and the alveoli (choking)
blockage of gas exchange by another substance or chemical (drowning, infection)
not enough hemoglobin to carry oxygen (anemia)
blood clots in the capillaries or veins (pulmonary emboli)
difficulty exhaling because of trapped air (asthma or chronic obstructive pulmonary disease)
muscles used to breathe are too weak (spinal cord injury, myasthenia gravis)
A clot in the left leg produces an embolus (a free-floating blood clot) that travels through the venous
system to the inferior vena cava. The embolus passes through the right side of the heart, through the
pulmonary artery, and lodges in a smaller vein within the lungs blocking the flow of blood. - answer ✔✔-
Many different things can impact gas exchange. Here are just a few to consider:
There is not enough oxygen being collected (ventilation) or something is preventing the oxygen from
getting to its destination (perfusion). Click on each tab below to see some reasons for each. - answer
✔✔-When something does go wrong, there are two main reasons this happens.
limited or no oxygen in the environment (limited oxygen in surrounding environment)
not enough pressure to pull the oxygen into the lungs (muscle weakness)
something is blocking the airway (foreign object or tongue) - answer ✔✔-ventilation
