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WorksheetsMechanisms of breathing
Total questions: 11
Worksheet time: 6mins
What happens to the pressure in the lungs when the thoracic cavity expands?
decreases
increases
stays the same
What happens to the volume in the lungs when the thoracic cavity is made smaller
decreases
increases
stays the same
decreases pressure
What is the path of an air molecule into the lungs?
trachea, larynx, bronchioles, bronchus
larynx, trachea, bronchus, bronchioles
trachea, bronchus, larynx, bronchioles
bronchus, pharynx, epiglottis, alveloi
What happens at the alveoli?
air sacs are made
the chest is raised
gaseous exchange
inhalation
What happens to the lung pressure before inhalation
stays the same
increases
decreases
Boyle's law says that the volume and pressure of a gase are inversely proportional, what does this mean?
if volume increases, then pressure increases
if volume increases, then pressure decreases
if volume increases, then pressure stays the same
Using Dalton's Law, what is the partial pressure of gas A in the following:
Total pressure: 160mmHg (gas A + gas B)
Partial pressure of gas B: 55mmHg
215mmHg
105mmHg
8800mmHg
2.91mmHg
There is a ____________ resistance to air flow in the trachea than the bronchioles due to ______________ in the trachea.
higher, larger cross-sectional area
lower, a smaller cross-sectional area
higher, a smaller cross-sectional area
lower, a larger cross-sectional area
High compliance means
it is easier to expire
it is harder to inspire
it is hard to expire
the volume of the airways that isn't involved in gas exchange is known as the
anatomical dead space
physiological dead space
An increase in CO2 in the blood has what effect?
a decrease in pH
an increase in pH
