APHY 102 EXAM 3 QUESTIONS AND ANSWERS
What factor determines whether a structure in the respiratory system is part of the "conduction pathway" or the "respiratory pathway"
whether or not the structure accomplishes gas exchange
The slit-like opening between the vocal cords or the larynx is t...
APHY 102 EXAM 3 QUESTIONS AND
ANSWERS
What factor determines whether a structure in the respiratory system is part of the "conduction
pathway" or the "respiratory pathway"
whether or not the structure accomplishes gas exchange
The slit-like opening between the vocal cords or the larynx is the _; the largest cartilage of the larynx
is the _
glottis; thyroid cartilage
What are "conchae", as the term applies to the respiratory system
tiny, curled bones that scroll inward from the sides of the nasal cavity, separating it into chambers
Which of the following accurately describes the histology of the alveoli
simple squamous epithelium, no cartilage rings, and no smooth muscle
Find the false statement below, if any, concerning the bronchi
the segmental bronchi are also called secondary bronchi
What is the "respiratory membrane"
the layers of simple squamous epithelium of the alveoli and pulmonary capillaries, and the basement
membranes between them
Find the false statement below, if any, concerning surface tension in the respiratory system
it is increased by surfacant
How is the process of normal, quiet inspiration accomplished
by phrenic nerve stimulation of the diaphragm, and contraction of the diaphragm and external
intercostals
Find the false statement below, if any, concerning normal, quiet expiration
it is an active process, concerning contraction of several muscles
All of the following are true of the anatomy of the lungs, except
the parietal pleura is continuous with the outer surface of the lungs
Find the false statement below, if any, concerning emphysema
it involves an excess production of surfactant in the lungs
Find the false statement below, if any, concerning atelectasis
its most common cause is a bacterial infection of streptococcus atelectasis
Which of the following is true of anatomic dead space
in most cases, it is practically equal to physiologic dead space
, How is O2 transported throughout the blood
98% of hemoglobin, 2% dissolved in the plasma
What is the significance of the Hering-Breuer Reflex
it prevents overinflation of the lungs or lung collapse during forced breathing
Which of the following events would tend to increase dissociation of O2 from oxyhemoglobin
a decrease in blood pH
The "formed elements" of the blood are _, and they makeup about _% of the blood volume
red and white blood cells and platelets; 45%
Find the false statement below, if any, concerning red blood cells (RBCs)
RBCs are produced in the red bone marrow, liver and spleen
Find the false statement below, if any, concerning eosinophils
they are very active phagocytes
Which of the following types of white blood cells comprises about 3-9% of the WBC population, is a
strong phagocyte, and can further differentiate into a macrophage
monocytes
Polycythemia
it is a genetic disorder, which causes the formation of too many RBCs Blood becomes viscous
(hematocrit may reach 80 -90%) cells become O2 -starved, because RBCs block the smaller blood
vessels.
Find the false statement below, if any, concerning platelets
they are also called megakaryocytes
Which of the following blood disorders involves a decrease in O2-carring capacity, due to a genetic
abnormality in the 3-dimensional structure of hemoglobin molecules, which results in the formation
of rigid, inflexible RBCs that clog capillaries and rupture when they hit the walls of blood vessels
sickle cell anemia
What is chemotaxis
movement of white blood cells toward a site of infection or injury, due to attraction by certain
chemicals
Find the false statement, if any, concerning the process of hemostasis
platelets secrete norepinephrine, which dilates smooth muscle in the walls of broken blood vessels,
and increases blood flow to the injured area
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