Kin 2YY3 Test 2 Questions With Complete Solutions
Airway resistance Correct Answers • Airflow = pressure
difference between the alveoli and the
atmosphere /resistance
• Bronchioles - reduced resistance during inhalation and
increased
resistance during exhalation
• SNS (NE) - relaxation of smooth muscle in the airways
causing
dilation = reduced resistance
• PNS (ACh) - contraction of smooth muscle = increased
resistance
Alveolar pressures during expiration Correct Answers
Palv>Pb, diaphragm relaxes
Alveolar pressures during inspiration Correct Answers During
inspiration Pb>Palv,
diaphragm contracts
Alveolar ventilation Correct Answers volume of air available
for gas
exchange/minute
Anatomic dead space Correct Answers formed by nasal cavity,
pharynx, larynx,
trachea, bronchi, bronchioles, and terminal bronchioles
Aortic arch divides into Correct Answers arching posteriorly
and to the left and has three
, branches
• Brachiocephalic artery
• Left common carotid
• Left subclavian artery
Arterioles Correct Answers • Transport blood from small
arteries to capillaries
• Smallest arteries where the three tunics can be
differentiated
• Like small arteries, capable of vasoconstriction and
dilatlast place with smooth muscle
Ascending aorta divides into Correct Answers right and left
coronary arteries branch from
here
Blood flow Correct Answers • Blood flow - volume of blood
that flows through any tissue
in a given time period (mL/min)
• Total blood flow is cardiac output (CO)
Boyle's law Correct Answers • As the size of closed container
decreases, pressure inside is increased
• The molecules have less wall area to strike so the pressure on
each inch of
area increases.
Branching of bronchial tree Correct Answers Trachea > Mian
bronchi > Lobar bronchi > Segmental bronchi > bronchioles >
terminal bronchioles
Airway resistance Correct Answers • Airflow = pressure
difference between the alveoli and the
atmosphere /resistance
• Bronchioles - reduced resistance during inhalation and
increased
resistance during exhalation
• SNS (NE) - relaxation of smooth muscle in the airways
causing
dilation = reduced resistance
• PNS (ACh) - contraction of smooth muscle = increased
resistance
Alveolar pressures during expiration Correct Answers
Palv>Pb, diaphragm relaxes
Alveolar pressures during inspiration Correct Answers During
inspiration Pb>Palv,
diaphragm contracts
Alveolar ventilation Correct Answers volume of air available
for gas
exchange/minute
Anatomic dead space Correct Answers formed by nasal cavity,
pharynx, larynx,
trachea, bronchi, bronchioles, and terminal bronchioles
Aortic arch divides into Correct Answers arching posteriorly
and to the left and has three
, branches
• Brachiocephalic artery
• Left common carotid
• Left subclavian artery
Arterioles Correct Answers • Transport blood from small
arteries to capillaries
• Smallest arteries where the three tunics can be
differentiated
• Like small arteries, capable of vasoconstriction and
dilatlast place with smooth muscle
Ascending aorta divides into Correct Answers right and left
coronary arteries branch from
here
Blood flow Correct Answers • Blood flow - volume of blood
that flows through any tissue
in a given time period (mL/min)
• Total blood flow is cardiac output (CO)
Boyle's law Correct Answers • As the size of closed container
decreases, pressure inside is increased
• The molecules have less wall area to strike so the pressure on
each inch of
area increases.
Branching of bronchial tree Correct Answers Trachea > Mian
bronchi > Lobar bronchi > Segmental bronchi > bronchioles >
terminal bronchioles
