HUMAN PHYSIO Question and answers
already passed 2025
Complete each sentence describing the relationship between volume and
pressure, and how it applies to ventilation. - correct answer As the volume of
a chamber decreases, the pressure inside the chamber increases. As the
volume increases, the pressure decreases.
Air always moves from an area of high pressure to an area of low pressure.
During inspiration, the intra-alveolar pressure is less than atmospheric
pressure.
During expiration, the intra-alveolar pressure is greater than atmospheric
pressure.
When the diaphragm contracts, the intra-alveolar pressure decreases.
As the intercostal muscles relax and the thoracic cavity becomes smaller, the
intra-alveolar pressure increases.
Pressure and volume are inversely related, so as the thoracic cavity and
alveolar volumes increase, the pressure drops and air moves into the lungs.
When the thoracic cavity and alveolar volume are reduced, the pressure rises
and air rushes out.
Complete each sentence and place them in the correct order, describing the
events of inspiration. - correct answer Inspiration begins with the contraction
of the diaphragm, a dome-shaped muscle, and the external intercostals,
located between the ribs.
,Contraction of these muscles causes the thoracic volume to increase.
The change in thoracic volume causes a decrease in intra-alveolar pressure.
As a result, the alveolar air pressure is less than the atmospheric pressure.
The final result is that air flows into the lungs.
Place the events leading to inspiration in correct order. - correct answer 1.
The respiratory center sends an impulse via the phrenic nerves.
2. The diaphragm contracts and moves downward.
3. The volume of thoracic cavity increases.
4. The pressure in the alveoli decreases to 758 mmHg.
5. Air moves into the lungs.
The force that moves air into the lungs during inspiration comes from the -
correct answer atmospheric pressure.
The force responsible for normal expiration is supplied by the - correct answer
elastic recoil of tissues and surface tension.
,Ordinary air is about 21% oxygen and 0.04% carbon dioxide. - correct answer
True
Gases are exchanged so they can be delivered and picked up from cells -
correct answer as a result of cellular respiration and as a result of producing
ATP
The respiratory system - correct answer aids in pH control, removes heat
from body, and helps control water level within body
functional unit of the respiratory system - correct answer alveoli
oxygen diffuses into the bloodstream - correct answer at the alveoli
The trachea and respiratory passages are lined with - correct answer
epithelial tissue
goblet cells - correct answer produce mucus
cilia - correct answer traps particles and moves mucus
respiratory system - correct answer
covers opening to air passage to prevent food entering lungs and choking -
correct answer epiglottis
combined passageway that carries both food and air - correct answer
pharynx
, alveolar capillaries - correct answer
alveoli bands - correct answer
where gas exchange takes place - correct answer alveoli
when these relax airflow will increase - correct answer smooth muscle (bands
around bronchioles)
oxygen diffuses into, Carbon Dioxide diffuse out of - correct answer
pulmonary capillaries
if you are a molecule of oxygen trace your journey - correct answer
atmosphere --> nasal cavity --> pharynx --> epiglottis --> trachea --> bronchus
--> bronchiole --> alveoli --> pulmonary capillary --> pulmonary vein --> left
side of heart --> aorta --> cells
bicarbonate buffer system - correct answer
where does the bicarbonate buffer system formula occur in the body - correct
answer bloodstream
the process in which organisms transfer energy from food molecules into a
useable form for cellular work - correct answer cellular respiration
which produces carbon dioxide in the biocarbonate buffer system - correct
answer cellular respiration
already passed 2025
Complete each sentence describing the relationship between volume and
pressure, and how it applies to ventilation. - correct answer As the volume of
a chamber decreases, the pressure inside the chamber increases. As the
volume increases, the pressure decreases.
Air always moves from an area of high pressure to an area of low pressure.
During inspiration, the intra-alveolar pressure is less than atmospheric
pressure.
During expiration, the intra-alveolar pressure is greater than atmospheric
pressure.
When the diaphragm contracts, the intra-alveolar pressure decreases.
As the intercostal muscles relax and the thoracic cavity becomes smaller, the
intra-alveolar pressure increases.
Pressure and volume are inversely related, so as the thoracic cavity and
alveolar volumes increase, the pressure drops and air moves into the lungs.
When the thoracic cavity and alveolar volume are reduced, the pressure rises
and air rushes out.
Complete each sentence and place them in the correct order, describing the
events of inspiration. - correct answer Inspiration begins with the contraction
of the diaphragm, a dome-shaped muscle, and the external intercostals,
located between the ribs.
,Contraction of these muscles causes the thoracic volume to increase.
The change in thoracic volume causes a decrease in intra-alveolar pressure.
As a result, the alveolar air pressure is less than the atmospheric pressure.
The final result is that air flows into the lungs.
Place the events leading to inspiration in correct order. - correct answer 1.
The respiratory center sends an impulse via the phrenic nerves.
2. The diaphragm contracts and moves downward.
3. The volume of thoracic cavity increases.
4. The pressure in the alveoli decreases to 758 mmHg.
5. Air moves into the lungs.
The force that moves air into the lungs during inspiration comes from the -
correct answer atmospheric pressure.
The force responsible for normal expiration is supplied by the - correct answer
elastic recoil of tissues and surface tension.
,Ordinary air is about 21% oxygen and 0.04% carbon dioxide. - correct answer
True
Gases are exchanged so they can be delivered and picked up from cells -
correct answer as a result of cellular respiration and as a result of producing
ATP
The respiratory system - correct answer aids in pH control, removes heat
from body, and helps control water level within body
functional unit of the respiratory system - correct answer alveoli
oxygen diffuses into the bloodstream - correct answer at the alveoli
The trachea and respiratory passages are lined with - correct answer
epithelial tissue
goblet cells - correct answer produce mucus
cilia - correct answer traps particles and moves mucus
respiratory system - correct answer
covers opening to air passage to prevent food entering lungs and choking -
correct answer epiglottis
combined passageway that carries both food and air - correct answer
pharynx
, alveolar capillaries - correct answer
alveoli bands - correct answer
where gas exchange takes place - correct answer alveoli
when these relax airflow will increase - correct answer smooth muscle (bands
around bronchioles)
oxygen diffuses into, Carbon Dioxide diffuse out of - correct answer
pulmonary capillaries
if you are a molecule of oxygen trace your journey - correct answer
atmosphere --> nasal cavity --> pharynx --> epiglottis --> trachea --> bronchus
--> bronchiole --> alveoli --> pulmonary capillary --> pulmonary vein --> left
side of heart --> aorta --> cells
bicarbonate buffer system - correct answer
where does the bicarbonate buffer system formula occur in the body - correct
answer bloodstream
the process in which organisms transfer energy from food molecules into a
useable form for cellular work - correct answer cellular respiration
which produces carbon dioxide in the biocarbonate buffer system - correct
answer cellular respiration
