WorksheetsDr. Jones Review Questions
Total questions: 58
Worksheet time: 29mins
Type I alveolar cells secrete pulmonary surfactant
TRUE
FALSE
The parietal pleura covers the surface of the lungs
TRUE
FALSE
Intrapulmonary pressure increases as the diaphragm
TRUE
FALSE
Lung compliance increases as the amount of surfactant in the lung increases
TRUE
FALSE
Contraction of the internal intercostal muscles expands the thoracic cavity
FALSE
TRUE
The maximum amount of gas that can be inspired after a normal tidal expiration is the inspiratory capacity
TRUE
FALSE
Sympathetic agonists could be utilized to treat asthma.
TRUE
FALSE
The partial pressure of oxygen decreases at high altitude because the amount of oxygen in the air is decreased
TRUE
FALSE
Breathing 100% oxygen will increase the total oxygen content of whole blood by 5 times
TRUE
FALSE
Arterial blood pH is indirectly proportional to the partial carbon dioxide pressure of arterial blood.
TRUE
FALSE
Central chemoreceptors respond to changes in arterial oxygen and carbon dioxide
TRUE
FALSE
Which of the following is NOT part of the conducting zone?
primary bronchi
nose
alveoli
trachea
Which of the following is NOT a function of the conducting zone?
gas exchange
filtering and cleaning the air
warming and humidifying the air
All of the choices are functions
Intrapleural pressure __________ during expiration
increases
decreases
remain unchaged
During inspiration,
alveolar pressure exceeds atmospheric pressure
transpulmonary pressure increases.
the diaphragm relaxes.
intrapulmonary pressure is less than atmospheric pressure
What law states that the pressure of a given quantity of gas is inversely proportional to its volume
Boyle's Law
Charles Law
Dalton's Law
Henry's Law
A measure of the distensibility of the lungs is
compliance.
elasticity.
surface tension.
None of the choices are correct.
The tendency of the lungs to return to their initial size after stretching is
compliance.
elasticity
surface tension.
None of the choices are correct.
According to who's law, is the pressure in a small alveolus greater than a large alveolus as long as the surface tension is equal?
Boyle's law
Dalton's law
Laplace's law
Henry's law
Quiet expiration is caused by
contraction of the external intercostals.
contraction of the internal intercostals.
lung recoil and increased intrapulmonary pressure.
contraction of the scalenes.
Quiet inspiration will ____ thoracic and lung volume and _____ intrapulmonary pressure
increase, increase
increase, decrease
decrease, increase
decrease, decrease
Which of the following is true?
Blood in the pulmonary veins is low in oxygen.
The oxygen concentration of inspired air is higher than that of alveolar air
Blood in the pulmonary veins is high in carbon dioxide.
All of the choices are true.
The volume of gas inspired or expired in a quiet respiration cycle is the
tidal volume
vital capacity.
inspiratory reserve volume.
residual volume.
The total amount of gas in the lungs after a maximum inspiration is the
vital capacity.
total lung capacity.
tidal volume
functional residual capacity
Gas X makes up 15% of a gas mix, at 760 mm Hg, the partial pressure of gas X would be
11400 mm Hg
1140 mm Hg
114 mm Hg
646 mm Hg
The amount of a given gas dissolved in the blood
is directly proportional to the partial pressure of the gas
increases at higher altitudes.
is described primarily by Boyle's law
All of the choices are correct.
Normal arterial PO2 is
40 mm Hg.
46 mm Hg
85 mm Hg
100 mm Hg
Normal alveolar PO2 is
40 mm Hg.
46 mm Hg
100 mm Hg.
105 mm Hg.
Normal venous PCO2 is
40 mm Hg
46 mm Hg.
100 mm Hg.
105 mm Hg.
The ventilation/perfusion ratio:
is lowest at the apex of the lungs.
increases when blood flow is decreased.
decreases when ventilation is increased.
increases due to dilation of the pulmonary arterioles.
Blood flow is greatest at the _____ of the lungs and perfusion is greatest at the _____ of the lungs.
apex; apex
apex; base
base; base
base; apex
Peripheral chemoreceptors that can detect changes in blood pH are located in the
medulla oblongata.
aortic and carotid bodies.
pons.
lungs.
The primary drive to breath is elicited by which of the following:
reduced PO2.
reduced PCO2.
increased PO2.
increased PCO2
What is the condition of having low blood oxygen levels?
hypocapnia
hypercapnia
hypoxia
hypoxemia
The dorsal respiratory group in the medulla oblongata is involved with
inspiration.
expiration.
breathing rhythm.
both inspiration and expiration.
Hyperventilation is stimulated by
increased activity of the apneustic center.
decreased contraction of the scalenes
hypercapnia (high carbon dioxide)
hypoxemia.
Carbon monoxide is lethal because it
reduces CO2 and slows breathing.
increases CO2 and causes seizures.
binds hemoglobin preventing oxygen binding.
increases oxygen unloading at the cells.
The affinity of hemoglobin for oxygen is __________ as the partial pressure of oxygen is raised.
increased
decreased
unchanged
The Bohr effect
describes the effect of pH on the affinity of hemoglobin for oxygen.
describes the effect of pH on the affinity of hemoglobin for carbon dioxide.
describes the mechanism of ventilation.
describes the effect of solubility on the amount of gas dissolved in blood.
A decrease in temperature will shift the oxygen dissociation curve to the
right
left
will not shift the curve.
An increase in 2,3-diphosphoglyceric acid (2,3-DPG) will ________ the affinity of hemoglobin for oxygen.
increase
decrease
have no effect on
The exchange of chloride ions for bicarbonate through tissue capillaries is called the
chloride shift.
Bohr effect.
oxygen toxicity.
acidosis.
The majority of carbon dioxide is transported in the blood as
dissolved carbon dioxide in the blood.
bicarbonate ion.
carbaminohemoglobin.
carboxyhemoglobin.
Carbon dioxide _____ oxygen unloading and oxygen unloading _______ carbon dioxide transport.
increases, improves
increases, worsens
decreases, improves
decreases, worsens
Which of the following separates the lungs from the pleural space?
Visceral Pleura
Parietal Pleura
Type I pneumocyte
Chest wall
If the atmospheric pressure is 700 mm Hg and it contains 20% oxygen, which of the following is closest to the partial pressure of the inspired, humidified oxygen in a person's airway (in mm Hg)?
160
140
560
130
A patient is breathing at a rate of 20 breathes per minute and a has a tidal volume of 600 ml. What is the calculated alveolar ventilation in L/min (assume normal anatomical dead space)?
9,000 ml/min
9 L/min
6 L/min
5000 ml/min
What is the partial pressure of carbon dioxide in a mixture of gases with a total pressure of 800 mmHg which is 54% Oxygen, 5% carbon dioxide and 41% Nitrogen?
800 mm Hg
40 mm Hg
430 mm Hg
0 mm Hg
Which of the following values most closely estimates the transpulmonary pressure at the end of an inspiration, normal lung at sea level (in mmHg)?
-7
+7
+1
-1
Which of the following structures is considered part of the conducting airways?
Alveolar duct
Alveoli
Main Bronchioles
Respiratory bronchioles
When the lung is at rest and the transpulmonary pressure is +4, what is the volume are in the lungs?
Residual volume
Vital Capacity
Function residual capacity
Tidal Volume
How will the compliance of a lung change if the surface tension within the alveoli increases?
no chance
decrease
increase
Which term is used to describe the total amount of air which can be moved into and out of the lungs during maximal effort?
Total lung capacity
Residual volume
Tidal Volume
Vital Capacity
Which of the following values most closely estimates the alveolar pressure during mid-inspiration, normal lung at sea level (in mmHg)?
-1
0
+4
+6
Which of the following terms is the volume of air moved into the lungs during inspiration?
Tidal volume
Inspiratory reserve volume
Residual volume
Tidal volume 1/2
What is the term used to describe the volume of air which can be expired from the lungs following a normal tidal volume exhale?
Expiratory reserve volume
Vital capacity
Tidal volume
Residual volume
Which of the following values most closely estimates the intrapleural pressure during mid-expiration, normal lung at sea level (in mmHg)?
-5
+4
-1
+5
How will the alveolar PCO2 change is a person hyperventilates?
increase
decrease
