EXPH 386 Exam 5 (Pulmonary Set) All
Respiratory Questions And Correct
Answers Vol \2\26 Updated
T OR F
The lung is the only organ (other than the heart) to receive the entire cardiac
output - true
Functions of the lung: - -gas exchange
-filtering (blood and air)
-captures inhaled particles
-breakdown vasoactive substances (metabolic functions)
-converts angiotensin I to angiotensin II (related to blood pressure and
kidneys) (ACE in the lungs)
-bradykinin
-serotonin
-norepinephrine
-PGE2 and PGF2 alpha
-leukotrienes
-vocalizations
At rest in the lungs the O2 consumption in the lungs consumed (VO2) is
approximately - 250 mL/min
At rest in the lungs CO2 produced (VCO2) approximately - 200 mL/min
At rest in the lungs ventilation is approximately - 5000 mL/min
At rest in the lungs cardiac output is approximately - 5000 mL/min
The resting RER in the lungs is around - 0.8
During exercise in the lungs VO2 is approximately - 3,000 mL/min (up to
6,250 mL/min in athletes)
,During exercise in the lungs VCO2 is approximately - 3,000 mL/min (up to
7,000 mL/min in athletes)
During exercise, ventilation is - > 60,000 mL/min
During exercise cardio output is - 30,000 mL/min
The right side of the lung is - 3 lobes
The left side of the lung is - 2 lobes
total length of the airways running in 2 lungs is - 1,500 miles
23 generations bifurcate to get _________ alveoli - 600 million
__________ alveolar structure gives the lung strength
-all the fragile walls are connected - "honeycomb"
What is ficks law of diffusion? - Vgas= A/T x D x (P1-P2)
A= area of membrane
T= thickness
D= diffusion constant of gas
P= pressure (Delta p)- determines driving pressure
resistance to expansion of the lungs increases during ______ due to
___________ - inspiration
surface tension on alveoli
lipoprotein mix of phospholipids, proteins, and Ca+2 produced by alveolar
epithelial cells-mixes with fluid around alveoli - surfactant
(as surface area gets smaller, you dont need superfactant as much)
-disrupts and lowers surface tension
-reduces energy needed for alveolar inflation/deflation
-w none of this, small aveoli collapse - Surfactant
Law of Laplace: - pressure (p)= 4 x surface tension (t)/
radius (r)
, Lungs are highly vascularized to allow for gas exchange: - 1) receives the
entire cardiac output
2) red blood cell (RBC) transit time in lung capillaries is approximately 0.75
seconds (0.25 seconds with exercise)
air moves INTO the lungs - inspiration
primary muscle of ventilation is - diaphragm
At rest in ventilation, the diaphragm _______ an moves ______
approximately 10 cm which ___________ volume allowing negative
pressure to come in - contracts
moves down
increases
Air moves into the lung due to the __________ - Universal Gas Law (PV=
nRT)
-simplified: PV=t
If temperature is constant... - pressure and volume are inversely related
(BOYLES LAW) = higher pressure and a lower volume equals K
air is forced into the lungs until - PI=PA
Air moves to the atmosphere - expiration
At rest and during light exercise, respiratory muscles are normally - passive
(inspiration muscles relax - diaphragm)
(lung is elastic- stretched lung tissue recoils)
During heavy exercise respiratory muscles are - active
(internal intercostals)
(abdominal muscles assist- tighten up muscles (expiration))
Normal lung volumes depend on: - -age
-sex
-stature (height)
Respiratory Questions And Correct
Answers Vol \2\26 Updated
T OR F
The lung is the only organ (other than the heart) to receive the entire cardiac
output - true
Functions of the lung: - -gas exchange
-filtering (blood and air)
-captures inhaled particles
-breakdown vasoactive substances (metabolic functions)
-converts angiotensin I to angiotensin II (related to blood pressure and
kidneys) (ACE in the lungs)
-bradykinin
-serotonin
-norepinephrine
-PGE2 and PGF2 alpha
-leukotrienes
-vocalizations
At rest in the lungs the O2 consumption in the lungs consumed (VO2) is
approximately - 250 mL/min
At rest in the lungs CO2 produced (VCO2) approximately - 200 mL/min
At rest in the lungs ventilation is approximately - 5000 mL/min
At rest in the lungs cardiac output is approximately - 5000 mL/min
The resting RER in the lungs is around - 0.8
During exercise in the lungs VO2 is approximately - 3,000 mL/min (up to
6,250 mL/min in athletes)
,During exercise in the lungs VCO2 is approximately - 3,000 mL/min (up to
7,000 mL/min in athletes)
During exercise, ventilation is - > 60,000 mL/min
During exercise cardio output is - 30,000 mL/min
The right side of the lung is - 3 lobes
The left side of the lung is - 2 lobes
total length of the airways running in 2 lungs is - 1,500 miles
23 generations bifurcate to get _________ alveoli - 600 million
__________ alveolar structure gives the lung strength
-all the fragile walls are connected - "honeycomb"
What is ficks law of diffusion? - Vgas= A/T x D x (P1-P2)
A= area of membrane
T= thickness
D= diffusion constant of gas
P= pressure (Delta p)- determines driving pressure
resistance to expansion of the lungs increases during ______ due to
___________ - inspiration
surface tension on alveoli
lipoprotein mix of phospholipids, proteins, and Ca+2 produced by alveolar
epithelial cells-mixes with fluid around alveoli - surfactant
(as surface area gets smaller, you dont need superfactant as much)
-disrupts and lowers surface tension
-reduces energy needed for alveolar inflation/deflation
-w none of this, small aveoli collapse - Surfactant
Law of Laplace: - pressure (p)= 4 x surface tension (t)/
radius (r)
, Lungs are highly vascularized to allow for gas exchange: - 1) receives the
entire cardiac output
2) red blood cell (RBC) transit time in lung capillaries is approximately 0.75
seconds (0.25 seconds with exercise)
air moves INTO the lungs - inspiration
primary muscle of ventilation is - diaphragm
At rest in ventilation, the diaphragm _______ an moves ______
approximately 10 cm which ___________ volume allowing negative
pressure to come in - contracts
moves down
increases
Air moves into the lung due to the __________ - Universal Gas Law (PV=
nRT)
-simplified: PV=t
If temperature is constant... - pressure and volume are inversely related
(BOYLES LAW) = higher pressure and a lower volume equals K
air is forced into the lungs until - PI=PA
Air moves to the atmosphere - expiration
At rest and during light exercise, respiratory muscles are normally - passive
(inspiration muscles relax - diaphragm)
(lung is elastic- stretched lung tissue recoils)
During heavy exercise respiratory muscles are - active
(internal intercostals)
(abdominal muscles assist- tighten up muscles (expiration))
Normal lung volumes depend on: - -age
-sex
-stature (height)
