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BIO 182 Exam 2 VERSION 1 & 2 COMPLETE QUESTIONS AND
CORRECT ANSWERS LATEST UPDATE THIS YEAR NEW!!
BIO 182 Exam 2 VERSION 1
QUESTION: At arrow A in the accompanying graph on oxygen saturation of hemoglobin, the
hemoglobin is only at 20% O2 saturation, and at arrow B, it is at 97% O2 saturation. The
difference in O2 saturations is due to the fact that:
A. oxygen binds irreversibly to hemoglobin in the lungs.
B. oxygen binds reversibly to hemoglobin with varying affinity due to cooperative binding.
C. the pH of blood differs in muscle capillaries versus pulmonary capillaries. - ANSWER-B
QUESTION: Which of the following statements is true? Select all that apply.
A. Blood pressure is higher in arteries than in veins.
B. Blood travels at a higher velocity in arteries than in veins.
C. The volume of blood flow in the arteries and arterioles is greater than the volume of blood
flow through the capillaries.
D. The total cross-sectional area of the capillaries is greater than the total cross-sectional area
of the venules and veins.
E. Capillaries have a higher resistance to flow than either arteries or veins. - ANSWER-A, B, D, E
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QUESTION: Which of the following statements explains why there is an elastic layer found in
arteries but not veins?
A. Valves present in veins provide a mechanism for withstanding high blood pressure flow going
through veins.
B. The total length of arteries in the body is more than the total length of veins, and the elastic
layer in arteries helps push the blood over the longer length.
C. Arteries are thicker than veins, and the elastic layer is necessary to support the additional
weight of arteries.
D. Blood pressure is higher in arteries than veins, and the elastic layer helps maintain the
structure of the artery. - ANSWER-D
QUESTION: Imagine a planet that has a similar atmospheric pressure to Earth (760 mmHg) but
different concentrations of gases in its atmosphere. On this hypothetical planet, oxygen makes
up 10% of the atmosphere, carbon dioxide makes up 15%, and nitrogen makes up the
remaining 75%. Based on this information, what is the partial pressure of oxygen on this new
planet?
A. 114 mmHg
B. 160 mmHg
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C. 646 mmHg
D. 76 mmHg
E. 571 mmHg - ANSWER-D
The respiratory and cardiovascular systems of vertebrate animals work in tandem to transport
oxygen to metabolizing tissues and to eliminate carbon dioxide as a waste gas. Which of the
following statements accurately describes how these systems interact for gas exchange? Select
all that apply.
A. The rate of oxygen transport by diffusion across the lungs must generally match the rate of
transport by the circulatory system.
B. Bulk flow of gases and solutes works well over long distances, whereas diffusion is effective
only over very short distances.
C. The rate of gas exchange by diffusion need not match rates of ventilation or circulatory
transport.
D. Bulk flow of gases and solutes works well over short distances, whereas diffusion is effective
over longer distances. - ANSWER-A & B
QUESTION: If the partial pressure of oxygen (pCO2) in a man's blood plasma decreased below
that in his red blood cells (RBCs), what would be the result?
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A. The concentration of oxygen would be the same in red blood cells and blood plasma.
B. Oxygen would diffuse out of his red blood cells, and less oxygen would be transported
throughout his body.
C. More oxygen would diffuse into his red blood cells and be transported throughout his body. -
ANSWER-B
QUESTION: We breathe more quickly and deeply when we exercise. Why does this make sense?
Select all that apply.
A. Because when we exercise, we use more ATP, and additional O2 is necessary to generate
sufficient ATP.
B. Because when we exercise, we hydrolyze more ATP to ADP and Pi, and O2 is necessary for
the hydrolysis, so we increase our intake of oxygen.
C. Because when we exercise, we consume more CO2 and must increase ventilation to supply
the CO2.
D. Because when we exercise, we produce more CO2 and increased ventilation is necessary to
rid ourselves of CO2. - ANSWER-A & D
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BIO 182 Exam 2 VERSION 1 & 2 COMPLETE QUESTIONS AND
CORRECT ANSWERS LATEST UPDATE THIS YEAR NEW!!
BIO 182 Exam 2 VERSION 1
QUESTION: At arrow A in the accompanying graph on oxygen saturation of hemoglobin, the
hemoglobin is only at 20% O2 saturation, and at arrow B, it is at 97% O2 saturation. The
difference in O2 saturations is due to the fact that:
A. oxygen binds irreversibly to hemoglobin in the lungs.
B. oxygen binds reversibly to hemoglobin with varying affinity due to cooperative binding.
C. the pH of blood differs in muscle capillaries versus pulmonary capillaries. - ANSWER-B
QUESTION: Which of the following statements is true? Select all that apply.
A. Blood pressure is higher in arteries than in veins.
B. Blood travels at a higher velocity in arteries than in veins.
C. The volume of blood flow in the arteries and arterioles is greater than the volume of blood
flow through the capillaries.
D. The total cross-sectional area of the capillaries is greater than the total cross-sectional area
of the venules and veins.
E. Capillaries have a higher resistance to flow than either arteries or veins. - ANSWER-A, B, D, E
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QUESTION: Which of the following statements explains why there is an elastic layer found in
arteries but not veins?
A. Valves present in veins provide a mechanism for withstanding high blood pressure flow going
through veins.
B. The total length of arteries in the body is more than the total length of veins, and the elastic
layer in arteries helps push the blood over the longer length.
C. Arteries are thicker than veins, and the elastic layer is necessary to support the additional
weight of arteries.
D. Blood pressure is higher in arteries than veins, and the elastic layer helps maintain the
structure of the artery. - ANSWER-D
QUESTION: Imagine a planet that has a similar atmospheric pressure to Earth (760 mmHg) but
different concentrations of gases in its atmosphere. On this hypothetical planet, oxygen makes
up 10% of the atmosphere, carbon dioxide makes up 15%, and nitrogen makes up the
remaining 75%. Based on this information, what is the partial pressure of oxygen on this new
planet?
A. 114 mmHg
B. 160 mmHg
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C. 646 mmHg
D. 76 mmHg
E. 571 mmHg - ANSWER-D
The respiratory and cardiovascular systems of vertebrate animals work in tandem to transport
oxygen to metabolizing tissues and to eliminate carbon dioxide as a waste gas. Which of the
following statements accurately describes how these systems interact for gas exchange? Select
all that apply.
A. The rate of oxygen transport by diffusion across the lungs must generally match the rate of
transport by the circulatory system.
B. Bulk flow of gases and solutes works well over long distances, whereas diffusion is effective
only over very short distances.
C. The rate of gas exchange by diffusion need not match rates of ventilation or circulatory
transport.
D. Bulk flow of gases and solutes works well over short distances, whereas diffusion is effective
over longer distances. - ANSWER-A & B
QUESTION: If the partial pressure of oxygen (pCO2) in a man's blood plasma decreased below
that in his red blood cells (RBCs), what would be the result?
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A. The concentration of oxygen would be the same in red blood cells and blood plasma.
B. Oxygen would diffuse out of his red blood cells, and less oxygen would be transported
throughout his body.
C. More oxygen would diffuse into his red blood cells and be transported throughout his body. -
ANSWER-B
QUESTION: We breathe more quickly and deeply when we exercise. Why does this make sense?
Select all that apply.
A. Because when we exercise, we use more ATP, and additional O2 is necessary to generate
sufficient ATP.
B. Because when we exercise, we hydrolyze more ATP to ADP and Pi, and O2 is necessary for
the hydrolysis, so we increase our intake of oxygen.
C. Because when we exercise, we consume more CO2 and must increase ventilation to supply
the CO2.
D. Because when we exercise, we produce more CO2 and increased ventilation is necessary to
rid ourselves of CO2. - ANSWER-A & D
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