ASU BIO 181 EXAM 3 ACTUAL TEST WITH COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS
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Course
ASU BIO 181
Institution
ASU BIO 181
ASU BIO 181 EXAM 3 ACTUAL TEST WITH COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS
Oxygen is distributed throughout the body by: - Answer-The circulatory system.
Nutrients and oxygen can leave the arteries and arterioles to reach the cells. - Answer-False
Blood moves very rapidly in the c...
ASU BIO 181 EXAM 3 ACTUAL TEST
WITH COMPLETE QUESTIONS AND
CORRECT DETAILED ANSWERS
Oxygen is distributed throughout the body by: - Answer-The circulatory system.
Nutrients and oxygen can leave the arteries and arterioles to reach the cells. - Answer-
False
Blood moves very rapidly in the capillaries. - Answer-False
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
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.
, 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
The lungs are in the thoracic cavity, but they are also in another cavity. What is the
name of that other cavity? - Answer-Intercostal muscles
The heart pace maker that triggers the two atria to contract is the __________________
__________________. - Answer-sinoatrial node
In capillaries the blood pressure pushes nutrients out of the capillaries towards the cells.
- Answer-True
When the diaphragm is relaxed, it allows air to leave the lungs including the residual
volume. - Answer-False
Draw a cross-section of an artery or arteriole and label the layers. - Answer-
The pulmonary artery contains oxygenated blood. - Answer-False
When you inhale which set of muscles uses the least amount of ATP and triggers the
parasympathetic nervous system? - Answer-External intercostal muscles (diaphragm)
In mammals ventilation is tidal. - Answer-True
The atrioventricular node fires after the sinoatrial node. - Answer-True
The lungs have increased surface area to increase the movement of oxygen into the
circulatory system. - Answer-True
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