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MT3Practice.pdf
MT3Practice.pdf
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Page 4
ID: A
4
____
16.
During a swallow, we contract the soft palate to prevent the food bolus from...
a.
entering the esophagus
b.
becoming trapped in the teeth
c.
leaving the mouth
d.
entering into the nasopharynx/ nasal sinuses
e.
exiting the trachea
____
17.
What is a role of the gastrointestinal tract?
a.
It can digest hormones
b.
It is involved with homeostasis of water and ions
c.
It creates foodstuff in the stomach
d.
It stores foodstuff in the large intestine
____
18.
Dr Bautista noted that some of the airways are wrapped with cartilage.
What is the
reason for this anatomical structure?
a.
The cartilage prevents dust from entering the lungs
b.
The cartilage is the site where gases cross between the blood and
respiratory system
c.
The cartilage allows the airways to stretch out, then collapse when we
breathe
d.
The cartilage gives strength and rigidity to the airways
____
19.
The name of the structure that allows gas exchange between the atmosphere and the
bloodstream is...
a.
The trachea
b.
The intercostal muscle
c.
The bronchiole
d.
The diaphragm
e.
The alveolus
____
20.
Dr Bautista noted that we increase the volume of the lung during respiratory efforts.
What is the reason that we do this?
a.
When we increase the lung volume, it helps us push air out of the lungs
b.
The lung volume increases because the respiratory muscles relax
c.
As the volume increases, the pressure inside the lung drops below
atmospheric pressure.
Air flows into the lung
d.
During inspiration, air rushes into the lung and inflates it to a large
volume
Page 5
ID: A
5
____
21.
As blood flows past tissues (such as exercising muscle), what causes hemoglobin to
release oxygen?
a.
The absence of lactic acid in the tissue
b.
The very cool temperature of the tissue
c.
The presence of local metabolites in the tissues
d.
Oxygen gets released when the muscles squeeze hemoglobin
e.
Actually, the blood
DOES NOT
release oxygen when it flows by tissue
____
22.
Carbon dioxide can be carried in the blood...
a.
in the chemical form called bicarbonate (HCO
3
-
)
b.
bound to blood proteins (such as the protein part of hemoglobin)
c.
as a dissolved gas
d.
ALL
of the above are
CORRECT
____
23.
What produces/creates carbon dioxide (CO
2
) in the body?
a.
Hemoglobin (Hb) creates CO
2
whenever oxygen binds to Hb
b.
As the cells create ATP, CO
2
is also created as a waste product
c.
When muscles break down ATP, the waste product is CO
2
d.
As cells die and removed from the body, CO
2
is released as the waste
e.
CO
2
is primarily produced by the tissues of the lung
____
24.
The pancreas produces enzymes that digest...
a.
Bile secretions
b.
Cellulose in plants
c.
Water
d.
Salt
e.
Starches
____
25.
Dr B mentioned that the brainstem regulates respiration in response to input by the
central chemoreceptive neurons. What did these chemosensitive neurons directly
detect?
a.
Protons (H+)
b.
Oxygen content in the neurons
c.
The amount of air in the lungs
d.
Carbon dioxide in the red blood cells
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University_of_California-Davis
School:
Elementary_Human_Physiology
Course:
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Leland P.
Santa Clara University
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