BIO 202: Unit #3 Practice Test Questions With Complete
Solutions
At a PO2 of 70 mm Hg and normal temperature and pH,
hemoglobin is ________% saturated with oxygen
over 90
Which would make the oxygen-hemoglobin curve shift right?
increased H+ concentration
Chronic hypoxia
increases 2,3-BPG production in blood and can result from
anemia
Most of the carbon dioxide in the blood is transported as
bicarbonate ions
In the medulla oblongata, the nucleus tractus solitarius contains
the ________ of neurons
dorsal respiratory group
The most important chemical regulator of respiration is
carbon dioxide
An increase in the level of carbon dioxide in the blood will
increase the rate of breathing
The expiratory neurons control the ________ muscles, whereas
the inspiratory neurons control the ________muscles
,abdominal muscles and internal intercostals, diaphragm and
external intercostals
The Hering-Breuer reflex
limiting ventilation volumes.
Protective reflexes of the lungs include
coughing and bronchoconstriction
Mara lives in St. Louis, which is close to sea level. She decides
to spend a month of her summer vacation working in the
mountains outside of Denver. After a week in the mountains,
what kinds of changes would you expect to see as Mara adapts
to the higher altitude?
decreased PO2 in the alveoli
Carbon dioxide is more soluble in water than oxygen. To get the
same amount of oxygen to dissolve in plasma as carbon dioxide,
you would have to
increase the partial pressure of oxygen
For maximum efficiency in loading oxygen at the lungs,
the temperature should be slightly lower than normal body
temperature
A student in your lab volunteers to enter a hypoxic breathing
chamber for 10 minutes, and his alveolar PO2 drops to 50 mm
Hg. What other change would occur?
decrease in arterial PCO2
A inhibitor of carbonic anhydrase would
,increase blood pH
The chloride shift occurs when
bicarbonate ions leave the red blood cells
Blocking afferent action potentials from the chemoreceptors in
the carotid and aortic bodies would interfere with the brain's
ability to regulate breathing in response to all EXCEPT which
changes?
changes in blood pressure
perfusion is
blood flow through an organ
fainting is also known as
vasovagal syncope
_____ are also known as the pressure reservoir of the
cardiovascular system
arteries
the inner lining of blood vessels is called
endothelium
smooth muscle is present in the walls of
all vessel types except capillaries and venules.
The highly branched contractile cells that regulate capillary
permeability are called
pericytes
, the only blood vessels whose walls permit exchange between the
blood and surrounding interstitial fluids are the
venules and capillaries
angiogenesis is
growth of new blood vessels
Angiostatin and endostatin may be useful in the treatment of
cancer
the values obtained when measuring blood pressure, such as
120/80
estimates the pressure in the major arteries during ventricular
systole and diastole
which of the following is occurring during systole?
blood pressure increases and more stress is placed on arterial
walls
the mean arterial pressure (MAP) is important because
it represents the driving pressure for blood flow
Blood flow to a tissue will increase if the
level of carbon dioxide at the tissue increases
the difference between systolic and diastolic pressure is called
the
pulse pressure
blood pressure is determined by measuring
Solutions
At a PO2 of 70 mm Hg and normal temperature and pH,
hemoglobin is ________% saturated with oxygen
over 90
Which would make the oxygen-hemoglobin curve shift right?
increased H+ concentration
Chronic hypoxia
increases 2,3-BPG production in blood and can result from
anemia
Most of the carbon dioxide in the blood is transported as
bicarbonate ions
In the medulla oblongata, the nucleus tractus solitarius contains
the ________ of neurons
dorsal respiratory group
The most important chemical regulator of respiration is
carbon dioxide
An increase in the level of carbon dioxide in the blood will
increase the rate of breathing
The expiratory neurons control the ________ muscles, whereas
the inspiratory neurons control the ________muscles
,abdominal muscles and internal intercostals, diaphragm and
external intercostals
The Hering-Breuer reflex
limiting ventilation volumes.
Protective reflexes of the lungs include
coughing and bronchoconstriction
Mara lives in St. Louis, which is close to sea level. She decides
to spend a month of her summer vacation working in the
mountains outside of Denver. After a week in the mountains,
what kinds of changes would you expect to see as Mara adapts
to the higher altitude?
decreased PO2 in the alveoli
Carbon dioxide is more soluble in water than oxygen. To get the
same amount of oxygen to dissolve in plasma as carbon dioxide,
you would have to
increase the partial pressure of oxygen
For maximum efficiency in loading oxygen at the lungs,
the temperature should be slightly lower than normal body
temperature
A student in your lab volunteers to enter a hypoxic breathing
chamber for 10 minutes, and his alveolar PO2 drops to 50 mm
Hg. What other change would occur?
decrease in arterial PCO2
A inhibitor of carbonic anhydrase would
,increase blood pH
The chloride shift occurs when
bicarbonate ions leave the red blood cells
Blocking afferent action potentials from the chemoreceptors in
the carotid and aortic bodies would interfere with the brain's
ability to regulate breathing in response to all EXCEPT which
changes?
changes in blood pressure
perfusion is
blood flow through an organ
fainting is also known as
vasovagal syncope
_____ are also known as the pressure reservoir of the
cardiovascular system
arteries
the inner lining of blood vessels is called
endothelium
smooth muscle is present in the walls of
all vessel types except capillaries and venules.
The highly branched contractile cells that regulate capillary
permeability are called
pericytes
, the only blood vessels whose walls permit exchange between the
blood and surrounding interstitial fluids are the
venules and capillaries
angiogenesis is
growth of new blood vessels
Angiostatin and endostatin may be useful in the treatment of
cancer
the values obtained when measuring blood pressure, such as
120/80
estimates the pressure in the major arteries during ventricular
systole and diastole
which of the following is occurring during systole?
blood pressure increases and more stress is placed on arterial
walls
the mean arterial pressure (MAP) is important because
it represents the driving pressure for blood flow
Blood flow to a tissue will increase if the
level of carbon dioxide at the tissue increases
the difference between systolic and diastolic pressure is called
the
pulse pressure
blood pressure is determined by measuring
