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ASU BIO 181 EXAM 3 NEWEST 2025/2026 NEWEST ACTUAL
EXAM WITH COMPLETE QUESTIONS AND VERIFIED
ANSWERS |ALREADY GRADED A+|
When oxygen passes from the lungs into the circulatory system
as a gas, how many cells does it have to pass through to be in the
circulatory system? - ANSWER-2. Alveoli and capillary cells.
The partial pressure of oxygen in the lungs causes it to load into
the circulatory system. - ANSWER-True
When arterial blood pressure falls the body compensates to raise
the blood pressure. Explain this process. - ANSWER-The kidneys
release renin which activates angiotensin (makes vessels
constrict) which causes arterial pressure to rise
When the ventricles contract blood is pushed out into the artery
and the artery stretches because of its elastic layers allowing the
blood to continue to flow into the circulatory system while the
ventricle is relaxing. - ANSWER-True
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Surfactants is one of the later components made in the fetus
(prior to birth). - ANSWER-True
The excretory system uses oxygen because oxygen diffuses
more rapidly into the excretory system because it contains water
in the urine. - ANSWER-False
The inspiratory and the expiratory reserves make up the total
volume in the lungs. - ANSWER-False
One of the problems with the increased surface area of the lungs
is that the __________________ could stick to each other
causing the lungs to collapse. To get around this the body
secretes __________________ into the lungs. - ANSWER-alveoli,
surfactant
What does carbonic anhydrase do? - ANSWER-Makes carbonic
acid from water and C02.
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When the systole occurs the ventricle is contracting. - ANSWER-
True
The oxygen in the circulatory system functions to bring oxygen to
every cell of the body so it can make ATP. - ANSWER-True
The heart contains two circuits. Name them. - ANSWER-Systemic
and pulmonary
Veins and venueles have valves in them, but arteries and
arterioles do not. - ANSWER-True
Once inside the circulatory system __________________ is the
molecule that binds oxygen. - ANSWER-hemoglobin
What is the maximum number of molecules of oxygen that can
bind to hemoglobin? - ANSWER-four
The blood flow slows down in the capillaries because the
increased total area of the capillary is very large. - ANSWER-True
ASU BIO 181 EXAM 3 NEWEST 2025/2026 NEWEST ACTUAL
EXAM WITH COMPLETE QUESTIONS AND VERIFIED
ANSWERS |ALREADY GRADED A+|
When oxygen passes from the lungs into the circulatory system
as a gas, how many cells does it have to pass through to be in the
circulatory system? - ANSWER-2. Alveoli and capillary cells.
The partial pressure of oxygen in the lungs causes it to load into
the circulatory system. - ANSWER-True
When arterial blood pressure falls the body compensates to raise
the blood pressure. Explain this process. - ANSWER-The kidneys
release renin which activates angiotensin (makes vessels
constrict) which causes arterial pressure to rise
When the ventricles contract blood is pushed out into the artery
and the artery stretches because of its elastic layers allowing the
blood to continue to flow into the circulatory system while the
ventricle is relaxing. - ANSWER-True
, Page |2
Surfactants is one of the later components made in the fetus
(prior to birth). - ANSWER-True
The excretory system uses oxygen because oxygen diffuses
more rapidly into the excretory system because it contains water
in the urine. - ANSWER-False
The inspiratory and the expiratory reserves make up the total
volume in the lungs. - ANSWER-False
One of the problems with the increased surface area of the lungs
is that the __________________ could stick to each other
causing the lungs to collapse. To get around this the body
secretes __________________ into the lungs. - ANSWER-alveoli,
surfactant
What does carbonic anhydrase do? - ANSWER-Makes carbonic
acid from water and C02.
, Page |3
When the systole occurs the ventricle is contracting. - ANSWER-
True
The oxygen in the circulatory system functions to bring oxygen to
every cell of the body so it can make ATP. - ANSWER-True
The heart contains two circuits. Name them. - ANSWER-Systemic
and pulmonary
Veins and venueles have valves in them, but arteries and
arterioles do not. - ANSWER-True
Once inside the circulatory system __________________ is the
molecule that binds oxygen. - ANSWER-hemoglobin
What is the maximum number of molecules of oxygen that can
bind to hemoglobin? - ANSWER-four
The blood flow slows down in the capillaries because the
increased total area of the capillary is very large. - ANSWER-True
