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Respiratory System Part 2
Test Description: The second part of the Respiratory System Test!
Instructions: Answer all questions to get your test result.
1) During expiration, a(n)_________occurs
A
increase in atmospheric pressure
B
increase in the volume of the lungs
C
decrease in intrapulmonary pressure
D
increase in intrapulmonary pressure
2) Each molecule of hemoglobin has the capacity to carry ________ molecules of oxygen.
A
6
B
2
C
4
D
8
3) What percentage of total oxygen is carried within red blood cells chemically bound to hemoglobin?
A
98%
B
5%
C
100%
D
68%
4) During exhalation, the diaphragm moves
A
downward and the ribs move upward
B
upward and the ribs move upward
C
upward and the ribs move downward
D
downward and the ribs move downward
5) When the diaphragm and external intercostal muscles contract, the
A
lungs collapse
B
volume of the lungs decreases
C
volume of the thorax decreases
D
volume of the thorax increases
6) The amount of air moved into or out of the lungs in a single passive respiratory cycle is the
A
tidal volume
B
expiratory reserve volume
C
vital capacity
D
residual volume
7) The amount of air exhaled with one forceful breath is the
A
vital capacity
B
tidal volume
C
residual volume
D
expiratory reserve volume
8) Most of the oxygen transported by the blood is
A
in ionic form in the plasma
B
bound to hemoglobin
C
carried by white blood cells
D
dissolved in plasma
9) Most of the carbon dioxide in the blood is transported as
A
bicarbonate ions
B
carbaminohemoglobin
C
carbonic acid
D
a solute dissolved in the plasma
10) A 10% increase in the level of carbon dioxide in the blood will
A
decrease pulmonary ventilation
B
decrease the rate of breathing
C
decrease the rate of alveolar ventilation
D
increase the rate of breathing
11) The percentage of CO2 that binds to hemoglobin in RBCs is
A
23%
B
7%
C
70%
D
93%
12) The percentage of CO2 converted to bicarbonate ions is RBCs is
A
7%
B
23%
C
70%
D
98%
13) The brain's involuntary respiratory centers that regulate the respiratory muscles and control the frequency and depth of breathing are the
A
brain stem and cerebrum
B
diencephalon and corpus callosum
C
pons and medulla oblongata
D
cerebrum and cerebellum
14) The normal rate and depth of breathing are established by the
A
dorsal respiratory group
B
vasomotor center
C
inspiratory center
D
expiratory center
15) The receptors located in the carotid arteries are
A
chemoreceptors
B
stretch receptors
C
Both a and b are correct
D
pressure receptors
16) The output from baroreceptors affects the respiratory centers, causing the respiratory rate to
A
decrease without affecting blood pressure
B
decrease with a decrease in blood pressure
C
increase with an increase in blood pressure
D
increase with a decrease in blood pressure
17) An elevated body temperature will
A
increase depth of respiration
B
decrease respiration
C
accelerate respiration
D
not affect the respiratory rate
18) Reflexes important in regulating the forced ventilations that accompany strenuous exercise are known as the
A
plantar reflexes
B
protective reflexes
C
Hering-Brewer reflexes
D
chemoreceptor reflexes
19) Reflexes that are responses to changes in the volume of the lungs or to changes in arterial blood pressure are
A
chemoreceptor reflexes
B
mechanoreceptor reflexes
C
baroreceptor reflexes
D
stretch receptor reflexes
20) The reflex that prevents the lungs from overexpanding during forced breathing is the _________reflex
A
baroreceptor
B
chemoreceptor
C
deflation
D
inflation
*select an answer for all questions
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