Respiratory System Part 2 Question Preview (ID: 33662)


The Second Part Of The Respiratory System Test![print questions]

Most of the oxygen transported by the blood is
a) dissolved in plasma
b) bound to hemoglobin
c) carried by white blood cells
d) in ionic form in the plasma

The amount of air exhaled with one forceful breath is the
a) tidal volume
b) vital capacity
c) residual volume
d) expiratory reserve volume

The amount of air moved into or out of the lungs in a single passive respiratory cycle is the
a) expiratory reserve volume
b) residual volume
c) tidal volume
d) vital capacity

When the diaphragm and external intercostal muscles contract, the
a) volume of the thorax increases
b) volume of the thorax decreases
c) volume of the lungs decreases
d) lungs collapse

What percentage of total oxygen is carried within red blood cells chemically bound to hemoglobin?
a) 5%
b) 68%
c) 98%
d) 100%

During exhalation, the diaphragm moves
a) upward and the ribs move downward
b) downward and the ribs move upward
c) downward and the ribs move downward
d) upward and the ribs move upward

Most of the carbon dioxide in the blood is transported as
a) carbonic acid
b) bicarbonate ions
c) carbaminohemoglobin
d) a solute dissolved in the plasma

Each molecule of hemoglobin has the capacity to carry ________ molecules of oxygen.
a) 6
b) 8
c) 4
d) 2

During expiration, a(n)_________occurs
a) decrease in intrapulmonary pressure
b) increase in intrapulmonary pressure
c) increase in atmospheric pressure
d) increase in the volume of the lungs

A 10% increase in the level of carbon dioxide in the blood will
a) decrease the rate of breathing
b) decrease pulmonary ventilation
c) increase the rate of breathing
d) decrease the rate of alveolar ventilation

The percentage of CO2 that binds to hemoglobin in RBCs is
a) 7%
b) 23%
c) 70%
d) 93%

The percentage of CO2 converted to bicarbonate ions is RBCs is
a) 7%
b) 23%
c) 70%
d) 98%

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) cerebrum and cerebellum
c) diencephalon and corpus callosum
d) pons and medulla oblongata

The normal rate and depth of breathing are established by the
a) inspiratory center
b) expiratory center
c) vasomotor center
d) dorsal respiratory group

The receptors located in the carotid arteries are
a) chemoreceptors
b) pressure receptors
c) stretch receptors
d) Both a and b are correct

The output from baroreceptors affects the respiratory centers, causing the respiratory rate to
a) decrease without affecting blood pressure
b) increase with an increase in blood pressure
c) decrease with a decrease in blood pressure
d) increase with a decrease in blood pressure

An elevated body temperature will
a) accelerate respiration
b) decrease respiration
c) increase depth of respiration
d) not affect the respiratory rate

Reflexes important in regulating the forced ventilations that accompany strenuous exercise are known as the
a) Hering-Brewer reflexes
b) protective reflexes
c) plantar reflexes
d) chemoreceptor reflexes

Reflexes that are responses to changes in the volume of the lungs or to changes in arterial blood pressure are
a) chemoreceptor reflexes
b) baroreceptor reflexes
c) stretch receptor reflexes
d) mechanoreceptor reflexes

The reflex that prevents the lungs from overexpanding during forced breathing is the _________reflex
a) inflation
b) deflation
c) chemoreceptor
d) baroreceptor

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